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A post from Prime Minister Boris Johnson's official office Twitter page urging Britons to stay home over the weekend has been derided for its poor use of Photoshop.

The Tweet shows two women sharing a bowl of popcorn on the sofa with their dog - and a mystery third person's hand.

People on social media have been quick to point out the weirdly-positioned arm and some have tried to make sense of it.

The Tweet reads: 'For staying safe, there's no place like home. Stay Home. Protect the NHS. Save Lives.'

The @10DowningStreet Twitter account posted this image on Friday urging people to stay indoors

People on social media have reacted in confusion due to a mysterious third person's arm seeming to come from under the dogs mouth

It shows the two women, one wearing a cream jumper and the other a yellow one, eating out of an orange bowl, while the mystery hand seems to have a black sleeve.

On closer inspection, the black sleeve appears to be an illusion created by a shadow cast by the couple's dog.

But that has not stopped people on social media debating the image and sharing jokes about what should have been an important message from the government.

Some compared the picture to the Alien and Addams Family films while others joked the dog must have eaten the neighbour.   

One quipped that the couple may be flouting social distancing rules by allowing someone from outside the household in to their home. 

People on social media were puzzled by the mystery third person's arm and mocked the Tweet for resembling popular movies series including Alien and the Addams Family 

Boris Johnson has himself been staying inside at his Chequers countryside home since leaving St Thomas' Hospital last weekend.

Communities Secretary Robert Jenrick said Mr Johnson was resting and recuperating under doctors' advice rather than getting straight back to work.

Mr Jenrick said: 'He's resting and recuperating at Chequers. He's taking his doctor's advice.

'He has had some contact with ministers, but mostly with his private office here at Downing Street and that's absolutely right. 

'We all wish him well and hope that he takes the time to get better as quickly as he possibly can in the interim.' 

Prime Minister Boris Johnson records a video message on Easter Sunday at 10 Downing Street  in Westminster after being release from St Thomas' Hospital before leaving for Chequers

Mr Johnson is recovering at the PM's country residence of Chequers, pictured on April 13

The number of cases of coronavirus in the UK has risen to 120,067 today. The number of deaths per day has fallen to 596, the lowest since April 6