An investigation by hundreds of British police and intelligence officers have pieced together the movements of the two Russians, from their entry into Britain through to their departure, the Guardian reported.
The decision to press for extradition follows a debate within the government, divided between those who want to ratchet up the response to Russian Federation and those who see the request as a futile political gesture, the Guardian reported.
The pair are believed to have made a trip to the United Kingdom to target ex-spy Sergei Skripal and his daughter Yulia who were poisoned with the nerve agent in March.
The move was reciprocated by Moscow.
Following this, Charlie Rowley and Dawn Strugess were treated for exposure to the nerve agent.
"We do not trust such unverified bogus media reports at all", the embassy said.
Palestinian teen dies of wounds from border clash: ministry
It added that in return, Hamas official said the Strip's rulers would commit to halting all attacks against Israel. Fire officials in Israel said incendiary balloons and kites set off almost 50 fires in Israel this weekend alone.
According to The Guardian, the Crown Prosecution Service (CPS) has prepared the papers required for the process and is ready to file.
"This is Litvinenko all over again".
Britain blamed Russian Federation for the poisonings and identified the poison as Novichok, a deadly group of nerve agents developed by the Soviet military in the 1970s and 1980s.
In 2007, President Vladimir Putin rejected an extradition request for two Russians suspected of the assassination of the former FSB officer Alexander Litvinenko in London using radioactive polonium. "The police have managed to identify the people coming over and going back again", a Whitehall source said. Later, Sturgess died in the hospital, the other victims were discharged after treatment.
Ms Sturgess died after being exposed to 10 times the amount of nerve agent the Skripals came into contact with.
Rowley said he had found a perfume bottle which he gave to Sturgess, which she sprayed on her wrists.