Detectives have named a suspected rapist accused of abducting two women off the streets as an “extremely dangerous” 33-year-old man.
Scotland Yard said on Tuesday that the individual they are hunting is Joseph McCann, but officers warned he is also known to use false names and may be using a disguise.
He is accused of separately snatching two women in their 20s in north London on Thursday.
Police are offering a reward of £20,000 for information which leads to the arrest and prosecution of the 33-year-old.
On April 25, Hertfordshire Police posted an appeal to find McCann saying he was wanted on recall to prison.
Police described McCann as being muscular, about 5ft 10in and having a “distinctive” tattoo of the name “bobbie” on his stomach.
He is said to have blue eyes, a bald head or shaved blond hair with a light-coloured beard, and a “slight” Irish accent.
Officers said he has recently gone by the name of Joel and has links to Watford, north-west London, Aylesbury, Buckinghamshire, and Ipswich in Suffolk.
Detective Chief Inspector Katherine Goodwin said: “We would ask anyone with any information about McCann’s whereabouts to contact us immediately - McCann is considered extremely dangerous and a risk to the public and we ask people not to approach him, but instead call 999.
“If you wish to remain anonymous, call Crimestoppers. It is vitally important we trace him in connection with these offences.
“My team continues to work around the clock and we are making progress in furthering the investigation.”
Both women were raped after being snatched by the suspect in a silver or grey-coloured Ford S-Max people carrier with false registration plates.
The first woman was abducted at about 12.30am on Thursday from a street in Chingford, before the second was seized around 12 hours later at 12.15pm from a street in Edgware.
They were driven to a hotel where the suspect attempted to book a room at around 1pm. They left when this was unavailable.
But the women managed to escape in Osborne Road, Watford, at about 2.30pm.
They were both “traumatised” by the ordeal and are receiving support from specialist officers, police said.
A 33-year-old man has been arrested on suspicion of conspiracy to rape, while the hunt for the rapist continues.
Crimestoppers can be contacted anonymously on 0800 555 111.