Vladimir Putin's London embassy has openly mocked Theresa May by spoofing an Oscar winning film because Britain has not found any Russian suspects over the poisoning of Sergei and Yulia Skripal two months ago.

Mr Putin's team has posted its own version of the famous scene from the Academy Award-winning film, Three Billboards Outside Ebbing, Missouri.

But instead they call it 'Three Billboards Outside Salisbury, Wiltshire' and the poorly photoshopped image says: 'Two months since Salisbury poisoning and still no suspects? How come, Prime Minister May?'

It recreate the scene from Martin McDonagh's Academy Award-winning film, where star Frances McDormand rents three billboards to shame police into properly investigating her daughter's unsolved murder.

Vladimir Putin's London embassy has openly mocked Britain by spoofing an Oscar winning film about murder after failing to find any Russian suspects over the poisoning of Sergei and Yulia Skripal two months ago

It recreate the scene from Martin McDonagh's Academy Award-winning film, where star Frances McDormand rents three billboards to shame police into properly investigating her daughter's unsolved murder (pictured)

The 'messy' assassination attempt on Sergei Skripal and his daughter Yulia may have led to Novichok getting on their shoes and being spread further than thought across Salisbury

It came as police said that all sites in the Skripal poisoning case in Salisbury have been decontaminated apart from the former spy's house.

But despite watching more than 5,000 hours of CCTV, examining 1,350 exhibits and interviewing dozens of people they have not identified the attackers.

Britain has pointed the finger directly at Moscow over the poisoning of Sergei Skripal and his daughter and they believe it was smeared on his front door.

In March the Prime Minister's national security adviser Mark Sedwill released a bombshell dossier that identified a Kremlin laboratory as the source of the nerve agent used in Salisbury.

The dossier – in a letter to Nato Secretary General Jens Stoltenberg – revealed how Britain had identified a Kremlin laboratory in south-west Russia where the Novichok agents were made.

It said Russia had been snooping on the emails of Sergei Skripal's daughter Yulia for five years and that it had been testing the effectiveness of Novichok smeared on door handles. The Skripals are thought to have come into contact with the nerve agent on their front door.

Its release was followed by a press conference from the Russian ambassador – in which he denied any Russian responsibility. The embassy then published an 8,000-word report into the row, reiterating that the Kremlin had 'nothing to do' with the attack.

Prime Minister Theresa May and her ministers were given an update at their weekly Cabinet meeting on Tuesday on what was described as 'one of the largest and most complex' counter-terror investigations the UK has ever seen.

Vladimir Putin and Theresa May are at loggerheads over Salisbury with Mrs May sure that the Russians were behind the nerve agent attack

Army officers remove the bench, where Sergei Skripal and his daughter were found in Salisbury, one of hundreds of sites sealed off

The UK has previously stated its conviction that only Russia had the means and motive to target the former spy. Pictured: Police at Sergei Skripal's home

They heard that more than 400 police officers - including some 250 counter-terrorism specialists - have been involved in the inquiry into the March 4 poisoning.

Ministers praised the 'resilience' of Salisbury residents in the face of disruption, which they blamed on 'Russia's reckless actions'.

Moscow has repeatedly denied responsibility for the attack on Sergei Skripal and his daughter, Yulia.

Mrs May's official spokesman told reporters: 'The police have now released all the sites for decontamination, except for the Skripal house.

'Clean-up work is well under way and the priority is making the sites safe so they can be returned to use and Salisbury can get back to normal.

'The ongoing investigation is one of the largest and most complex ever undertaken by counter-terrorism policing.

'Over 250 officers from across the counter-terrorism policing network have been deployed, alongside over 160 officers from Wiltshire Police and a range of experts and partners.

'Officers continue to trawl through over 5,000 hours of CCTV and examine over 1,350 exhibits that have been seized.

'Around 500 witnesses have been identified and hundreds of statements have been taken.'

The spokesman said a range of Government support is being provided to help Salisbury get back to normal, including grant funding for local businesses and support for local tourism initiatives.

'Cabinet praised the resilience of the residents of Salisbury in the face of widespread disruption caused by Russia's reckless actions,' the spokesman added.

'The city is safe and it is open for business.'