Lindsay Sandiford is the second British citizen to be sentenced to death for drug offences in Indonesia in recent months, according to human rights campaigners.

Amnesty International said British roofer Gareth Cashmore, 33, reportedly from Wakefield, West Yorkshire, was sentenced to death by firing squad last year in Indonesia.

lindsay sandiford

Briton Lindsay Sandiford being led away

He and Sandiford are among around 40 foreigners - most of them convicted of drug crimes - out of more than 100 prisoners on death row in the country.

"They have not actually executed anyone (in Indonesia) for three years, there have been no executions since 2008, but at least 100 people remain under sentence of death, that is obviously of great concern," a spokeswoman for Amnesty said.

"We are calling on Indonesia to commute all existing death sentences and impose instead an official moratorium instead of the unofficial one that has been in place since 2008."

According to Amnesty, more people are sentenced to death for drug offences than for any other crime in Asia-Pacific countries, with 16 countries sentencing people to death for drug trafficking and possession.

Worldwide, the number of executions has fallen by more than a third over the last decade, according to the organisation, with 21 out of 198 countries carrying out executions in 2011.

Death sentences were pardoned or commuted in 33 countries, compared to just 19 in 2010.

But Amnesty added that an "increasingly isolated" group of countries carried out executions at an "alarming rate" in 2011.

China continued to put thousands of people to death, and in the Middle East there was a sharp rise in the number of people executed in Iran, Iraq and Saudi Arabia, according to campaigners.

lindsay sandiford

Lindsay Sandiford reacts as her interpreter (L) looks on during her trial

States that year-on-year figured "consistently" among the top executioners included North Korea, Saudi Arabia, Somalia, USA and Yemen, it added.

At least 18,750 people remained under sentence of death at the end of 2011 and at least 680 people were executed worldwide that year, excluding China, according to Amnesty.

The Foreign Office said it was aware of 12 British citizens across the world who have been sentenced to death.

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  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL

    Lindsay June Sandiford (2nd R) of Britain arrives at a court in Denpasar on January 7, 2013. Indonesian prosecutors recommended a 15-year prison term on December 20, 2012 for the British grandmother accused of trafficking in cocaine on the resort island of Bali. Sandiford, 56, was arrested at Denpasar airport in May with 4.79 kilograms (10.6 pounds) of cocaine stashed in the lining of her suitcase. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL

    Lindsay June Sandiford (2nd R) of Britain arrives at a court in Denpasar on January 7, 2013. Indonesian prosecutors recommended a 15-year prison term on December 20, 2012 for the British grandmother accused of trafficking in cocaine on the resort island of Bali. Sandiford, 56, was arrested at Denpasar airport in May with 4.79 kilograms (10.6 pounds) of cocaine stashed in the lining of her suitcase. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL

    Lindsay June Sandiford (2nd R) of Britain arrives at a court in Denpasar on January 7, 2013. Indonesian prosecutors recommended a 15-year prison term on December 20, 2012 for the British grandmother accused of trafficking in cocaine on the resort island of Bali. Sandiford, 56, was arrested at Denpasar airport in May with 4.79 kilograms (10.6 pounds) of cocaine stashed in the lining of her suitcase. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL

    Lindsay June Sandiford (R) of Britain attends a court session in Denpasar on January 7, 2013. Indonesian prosecutors recommended a 15-year prison term on December 20, 2012 for the British grandmother accused of trafficking in cocaine on the resort island of Bali. Sandiford, 56, was arrested at Denpasar airport in May with 4.79 kilograms (10.6 pounds) of cocaine stashed in the lining of her suitcase. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL

    Lindsay June Sandiford (R) of Britain attends a court session in Denpasar on January 7, 2013. Indonesian prosecutors recommended a 15-year prison term on December 20, 2012 for the British grandmother accused of trafficking in cocaine on the resort island of Bali. Sandiford, 56, was arrested at Denpasar airport in May with 4.79 kilograms (10.6 pounds) of cocaine stashed in the lining of her suitcase. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL-VERDICT

    Lindsay June Sandiford (R) of Britain attends her trial at a court in Denpasar on the Indonesian resort island of Bali on January 22, 2013. An Indonesian court on January 22 sentenced a 56-year-old British grandmother to death for smuggling cocaine into the resort island of Bali. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL-VERDICT

    Lindsay June Sandiford (C) of Britain walks from a holding cell to the court room before her trial in Denpasar on the Indonesian resort island of Bali on January 22, 2013. An Indonesian court on January 22 sentenced 56-year-old Sandiford to death for smuggling cocaine into the resort island of Bali. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL-VERDICT

    Lindsay June Sandiford (C) of Britain reacts as she attends her trial at a court in Denpasar on the Indonesian resort island of Bali on January 22, 2013. An Indonesian court on January 22 sentenced 56-year-old Sandiford to death for smuggling cocaine into the resort island of Bali. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL-VERDICT

    Lindsay June Sandiford (R) of Britain reacts as she attends her trial at a court in Denpasar on the Indonesian resort island of Bali on January 22, 2013. An Indonesian court on January 22 sentenced a 56-year-old British grandmother to death for smuggling cocaine into the resort island of Bali. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL-VERDICT

    Lindsay June Sandiford (L) of Britain is escorted by a prosecutor as she arrives at a court in Denpasar on the Indonesian resort island of Bali on January 22, 2013. An Indonesian court on January 22 sentenced 56-year-old Sandiford to death for smuggling cocaine into the resort island of Bali. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL-VERDICT

    Lindsay June Sandiford (L) of Britain is escorted by a prosecutor as she arrives at a court in Denpasar on the Indonesian resort island of Bali on January 22, 2013. An Indonesian court on January 22 sentenced 56-year-old Sandiford to death for smuggling cocaine into the resort island of Bali. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL-VERDICT

    Lindsay June Sandiford (R) of Britain listens from her interpreter (L) during trial at a court in Denpasar on the Indonesian resort island of Bali on January 22, 2013. An Indonesian court on January 22 sentenced 56-year-old Sandiford to death for smuggling cocaine into the resort island of Bali. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL

    Lindsay June Sandiford (C) of Britain covers herself with fabric before her trial at a court in Denpasar on the Indonesian resort island of Bali on December 20, 2012. Indonesian prosecutors have recommended a 15-year prison sentence for Sandiford, who was arrested in May, 2012 with 4.79 kilograms (10.6 pounds) of cocaine after allegedly attempting to smuggle it into the island. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS-TRIAL

    Lindsay June Sandiford (R) of Britain listens to her interpreter (L) during her trial at a court in Denpasar on the Indonesian resort island of Bali on December 20, 2012. Indonesian prosecutors have recommended a 15-year prison sentence for Sandiford, who was arrested in May, 2012 with 4.79 kilograms (10.6 pounds) of cocaine after allegedly attempting to smuggle it into the island. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Lindsay June Sandiford (L) of Britain listens as fellow Briton Julian Anthony Ponder (R) testifies during Sandiford's trial at a court in Denpasar on the Indonesian resort island of Bali on November 28, 2012. Sandiford was arrested in May upon arrival at the resort island's airport in Denpasar from Bangkok after customs officials allegedly found 4.79 kilograms (10.6 pounds) of cocaine in the lining of her suitcase while Julian Anthony Pounder is accused of willingly receiving the drugs. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Lindsay June Sandiford (L) of Britain covers her face as fellow Briton Julian Anthony Ponder (R) testifies during Sandiford's trial at a court in Denpasar on the Indonesian resort island of Bali on November 28, 2012. Sandiford was arrested in May upon arrival at the resort island's airport in Denpasar from Bangkok after customs officials allegedly found 4.79 kilograms (10.6 pounds) of cocaine in the lining of her suitcase while Julian Anthony Pounder is accused of willingly receiving the drugs. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Lindsay June Sandiford (L) of Britain listens as fellow Briton Julian Anthony Ponder (not pictured) testifies during Sandiford's trial at a court in Denpasar on the Indonesian resort island of Bali on November 28, 2012. Sandiford was arrested in May upon arrival at the resort island's airport in Denpasar from Bangkok after customs officials allegedly found 4.79 kilograms (10.6 pounds) of cocaine in the lining of her suitcase while Julian Anthony Pounder is accused of willingly receiving the drugs. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/Getty Images)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Britain's Lindsay June Sandiford, 56, covers herself while inside a holding cell after her trial at a court in Denpasar on the Indonesian resort island of Bali on October 4, 2012. Sandiford's trial, who is accused of smuggling five kilogrammes (11 pounds) of cocaine into Indonesia, opened on September 27 but was adjourned because she was not accompanied by a lawyer. The 56-year-old Briton was arrested in May on arrival at the Denpasar airport on the resort island of Bali after the drug was allegedly found in her bag. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/GettyImages)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Britain's Lindsay June Sandiford (R), 56, listens to her interpreter as she attends her trial at a court in Denpasar on the Indonesian resort island of Bali on October 4, 2012. Sandiford's trial, who is accused of smuggling five kilogrammes (11 pounds) of cocaine into Indonesia, opened on September 27 but was adjourned because she was not accompanied by a lawyer. The 56-year-old Briton was arrested in May on arrival at the Denpasar airport on the resort island of Bali after the drug was allegedly found in her bag. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/GettyImages)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Britain's Lindsay June Sandiford (L), 56, gestures as she attends her trial at a court in Denpasar on the Indonesian resort island of Bali on October 4, 2012. Sandiford's trial, who is accused of smuggling five kilogrammes (11 pounds) of cocaine into Indonesia, opened on September 27 but was adjourned because she was not accompanied by a lawyer. The 56-year-old Briton was arrested in May on arrival at the Denpasar airport on the resort island of Bali after the drug was allegedly found in her bag. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/GettyImages)

  • INDONESIA-BRITAIN-DRUGS-TRIAL

    Britain's Lindsay June Sandiford (L), 56, wipes her face during her trial at a court in Denpasar on Indonesia's resort island of Bali on september 27, 2012. Sandiford was arrested on May 19 allegedly carrying 4.7 kilograms of cocaine in her luggage at Bali International Airport. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/GettyImages)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Britain's Lindsay June Sandiford (L), 56, is escorted by a police officer before her trial at a court in Denpasar on Indonesia's resort island of Bali on september 27, 2012. Sandiford was arrested on May 19 allegedly carrying 4.7 kilograms of cocaine in her luggage at Bali International Airport. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/GettyImages)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Britain's Lindsay June Sandiford (L), 56, attends her trial at a court in Denpasar on Indonesia's resort island of Bali on september 27, 2012. Sandiford was arrested on May 19 allegedly carrying 4.7 kilograms of cocaine in her luggage at Bali International Airport. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/GettyImages)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Britain's Lindsay June Sandiford, 56, attends her trial at a court in Denpasar on Indonesia's resort island of Bali on september 27, 2012. Sandiford was arrested on May 19 allegedly carrying 4.7 kilograms of cocaine in her luggage at Bali International Airport. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/GettyImages)

  • INDONESIA-BRITAIN-CRIME-DRUGS

    Britain's Lindsay June Sandiford, 56, attends her trial at a court in Denpasar on Indonesia's resort island of Bali on september 27, 2012. Sandiford was arrested on May 19 allegedly carrying 4.7 kilograms of cocaine in her luggage at Bali International Airport. AFP PHOTO / SONNY TUMBELAKA (Photo credit should read SONNY TUMBELAKA/AFP/GettyImages)