Prime Minister Boris Johnson has travelled to Wiltshire today to visit Public Health England's site at Porton Down.

Mr Johnson was supposed to visit the laboratory on Monday November 16 but his visit had to be pushed back after he was instructed to self-isolate following a meeting with an MP who later tested positive for Covid-19.

A spokesperson from Downing Street confirmed the Prime Minister came out of isolation on Thursday.

His visit comes just a few weeks after that of Her Majesty the Queen and Prince William, the monarch's first public engagement outside a royal residence since the pandemic began.

During his visit, Mr Johnson met scientists involved in development of rapid lateral flow tests.

Salisbury MP John Glen said: "I am immensely proud of the vitally important scientific work that is carried out at PHE Porton Down.

"It’s inspiring that local scientists are leading the way in developing our country’s approach to COVID-19 testing and I was delighted that the Prime Minister was able to come and see firsthand the work they are doing to keep us all safe."