Britain would welcome Iran back into the international community, said David Cameron on Monday, providing the pariah nation abandons ambitions to develop nuclear weaponry.

Hassan Rouhani, a supposed reformist, was elected to the office of Iranian president on Saturday, marking the end of Mahmoud Ahmedinejad’s difficult tenure characterised by unpredictability and confrontation.

Rouhani spoke of a thawing of relations with the west after his victory, reasserting his openness to build relations with the rest of the world. However, the fledgling leader has yet to speak directly on the truculent issue of nuclear arms, a suspected ambition of the Iranian state under Ahmedinejad, though Rouhani did campaign on the pledge of easing international sanctions imposed due to the country's nuclear programme.

Speaking in Northern Ireland ahead of the G8 summit, Cameron said he was open to signals of reconciliation from Tehran, insisting that London would was ready to engage in dialogue.

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"I've always believed that the right approach on Iran is to engage, to make a clear offer to the Iranians that there is a different path for them," said Cameron, adding: "If they don't go down the path of nuclear weapons, then they can become a full part of the international community.”

"Obviously, we will have to see how the new Iranian government reacts to that, but Britain will stand with America and others in continuing to make that offer."

Cameron’s words echoed a statement from the Foreign Office following Rouhani’s election, which called for the president to “use the opportunity to set Iran on a different course for the future: addressing international concerns about Iran's nuclear programme, taking forward a constructive relationship with the international community, and improving the political and human rights situation for the people of Iran.”

On Monday, Israeli Prime Minister Benjamin Netanyahu warned that sanctions imposed on Iran by the west should remain, despite Rouhani's victory.

"The international community should not fall into wishful thinking and be tempted to ease pressure on Iran to stop its nuclear programme," said Netanyahu, adding: "Iran will be judged on its actions. If it insists on continuing to develop its nuclear programme the answer needs to be clear - stopping its nuclear programme by any means."

Israel's President Shimon Peres told Reuters that he hope new leadership in Tehran would help bring about change. "It will be better, I am sure, and that is why the people voted for him," he said.

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  • G8 Summit

    US President Barack Obama delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • BRITAIN-G8-SUMMIT-OBAMA-ARRIVAL

    US President Barack Obama (2nd L), his wife Michelle (2nd R) and daughters Sasha (front) and Malia (R) are greeted by Joan Christie, The Queen's official representative in County Antrim, upon arrival at Belfast International Airport, Northern Ireland, on June 17, 2013, to attend the G8 summit in Enniskillen. AFP PHOTO/ PETER MUHLY (Photo credit should read PETER MUHLY/AFP/Getty Images)

  • Barack Obama, Michelle Obama, Sasha Obama, Malia Obama

    U.S. President Barack Obama, third from left, arrives at Aldergrove International Airport with, from left, daughter Malia, first lady Michelle Obama, and daughter Sasha on Monday, June 17, 2013, in Belfast, Northern Ireland. Obama is attending the G-8 summit in Enniskillen, Northern Ireland where leaders are expected to discuss the ongoing conflict in Syria, and free-trade issues. (AP Photo/Evan Vucci)

  • G8 Summit

    Japan's Prime Minister Shinzo Abe (second right), is welcomed by a Japanese embassy defence attach, as he arrives at Belfast International Airport, as G8 leaders from around the world begin to arrive in Northern Ireland for the G8 Summit.

  • Barack Obama, Sasha Obama

    President Barack Obama waves as he arrives at Aldergrove International airport with his daughter Sasha, in Belfast, Northern Ireland on Monday, June 17, 2013. Obama is attending the G-8 summit in Enniskillen, Northern Ireland where leaders are expected to discuss the ongoing conflict in Syria, and free-trade issues. (AP Photo/Evan Vucci)

  • Barack Obama, Sasha Obama, Michelle Obama, Malia Obama

    U.S. President Barack Obama, left, arrives with, from left, daughter Sasha, first lady Michelle Obama, and daughter Malia, at Aldergrove International airport on Monday, June 17, 2013, in Belfast, Northern Ireland. Obama is attending the G-8 summit in Enniskillen, Northern Ireland, where leaders are expected to discuss the ongoing conflict in Syria, and free-trade issues. (AP Photo/Evan Vucci)

  • G8 Summit

    Prime Minister David Cameron walks with Northern Ireland Secretary Theresa Villiers (second right) and Wing Commander Faye Wiseman (left) after arriving at Belfast International Airport, Northern Ireland, ahead of the G8 Summit.

  • BRITAIN-G8-SUMMIT-OBAMA-ARRIVAL

    US President Barack Obama waves as he exits Air Force One with his daughter Sasha upon arrival at Belfast International Airport, Northern Ireland, on June 17, 2013, to attend the G8 summit in Enniskillen. AFP PHOTO/ PETER MUHLY (Photo credit should read PETER MUHLY/AFP/Getty Images)

  • BRITAIN-G8-SUMMIT-OBAMA-ARRIVAL

    US President Barack Obama waves as he exits Air Force One with his daughter Sasha upon arrival at Belfast International Airport, Northern Ireland, on June 17, 2013, to attend the G8 summit in Enniskillen. AFP PHOTO/ PETER MUHLY (Photo credit should read PETER MUHLY/AFP/Getty Images)

  • G8 Summit

    Prime Minister David Cameron arrives at Belfast International Airport, Northern Ireland, ahead of the G8 Summit.

  • BRITAIN-G8-SUMMIT-OBAMA-ARRIVAL

    US President Barack Obama waves as he exits Air Force One with his daughter Sasha upon arrival at Belfast International Airport, Northern Ireland, on June 17, 2013, to attend the G8 summit in Enniskillen. AFP PHOTO/ PETER MUHLY (Photo credit should read PETER MUHLY/AFP/Getty Images)

  • BRITAIN-G8-SUMMIT-OBAMA-ARRIVAL

    US President Barack Obama disembarks from Air Force One with his wife Michelle (2nd R) and daughters Sasha (front R) and Malia (back R) upon arrival at Belfast International Airport, Northern Ireland, on June 17, 2013, to attend the G8 summit in Enniskillen. AFP PHOTO/ PETER MUHLY (Photo credit should read PETER MUHLY/AFP/Getty Images)

  • BRITAIN-G8-SUMMIT-OBAMA-ARRIVAL

    US President Barack Obama disembarks from Air Force One with his daughter Sasha upon arrival at Belfast International Airport, Northern Ireland, on June 17, 2013, to attend the G8 summit in Enniskillen. AFP PHOTO/ PETER MUHLY (Photo credit should read PETER MUHLY/AFP/Getty Images)

  • G8 Summit

    Flags of Japan and the United Kingdom are seen on the aircraft carrying Japan's Prime Minister Shinzo Abe as he arrives at Belfast International Airport, as G8 leaders from around the world begin to arrive in Northern Ireland for the G8 Summit.

  • G8 Summit

    US President Barack Obama delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • G8 Summit

    US President Barack Obama delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • G8 Summit

    Tight security is show as US President Barak Obama arrives at Belfast Waterfront Hall before delivering his keynote address ahead of the G8 summit.

  • Barack Obama

    President Barack Obama gestures during a speech at the Belfast Waterfront Hall on Monday June 17, 2013, in Belfast, Northern Ireland. Obama is attending the G-8 summit in Enniskillen, Northern Ireland where leaders are expected to discuss the ongoing conflict in Syria, and free-trade issues. (AP Photo/Evan Vucci)

  • G8 Summit

    Michelle Obama, the wife of the US President Barack Obama, delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • Barack Obama

    President Barack Obama gestures during a speech at the Belfast Waterfront Hall on Monday June 17, 2013, in Belfast, Northern Ireland. Obama is attending the G-8 summit in Enniskillen, Northern Ireland where leaders are expected to discuss the ongoing conflict in Syria, and free-trade issues. (AP Photo/Evan Vucci)

  • G8 Summit

    Michelle Obama, the wife of the US President Barack Obama, delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • G8 Summit

    Michelle Obama, the wife of the US President Barack Obama, delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • G8 Summit

    US President Barack Obama prior to delivering a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • G8 Summit

    Michelle Obama, the wife of the US President Barack Obama, waves to the crowd before she delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • G8 Summit

    Michelle Obama, the wife of the US President Barack Obama, applauds the crowd before she delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • G8 Summit

    Michelle Obama, the wife of the US President Barack Obama, delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • G8 Summit

    US President Barack Obama delivers a keynote address at Waterfront Hall in Belfast, ahead of the G8 Summit.

  • G8 Summit

    Tight security is show as US President Barak Obama arrives at Belfast Waterfront Hall before delivering his keynote address ahead of the G8 summit.