Video, 00:01:23Covid-19 symptoms: How long should I self-isolate? These are external links and will open in a new windowPrime Minister Boris Johnson has been moved to intensive care in hospital after his coronavirus symptoms "worsened", Downing Street has said.A spokesman said he was moved on the advice of his medical team and was receiving "excellent care".Mr Johnson has asked Foreign Secretary Dominic Raab to deputise "where necessary", the spokesman added.The prime minister, 55, was admitted to hospital in London with "persistent symptoms" on Sunday evening.The Queen has been kept informed about Mr Johnson's health by No 10, according to Buckingham Palace.BBC political correspondent Chris Mason said the prime minister was given oxygen late on Monday afternoon, before being taken to intensive care.A No 10 statement read: "The prime minister has been under the care of doctors at St Thomas' Hospital, in London, after being admitted with persistent symptoms of coronavirus. On its flagship About This Source - BBC News. He’s reportedly considering making a former Tory MP or possibly Andrew Neil the BBC ‘s new chair. Video, 00:07:14Meet the UK's youngest qualified pilot, aged 14. The public may have others ideas – but it will take rousing loud resistance, from the Ambridge shires to the EastEnders streets, from Radio 3 to Strictly and I May Destroy You fans. She said she had not been tested for the virus.Health Secretary Matt Hancock, who also tested positive for the virus and spent time in self-isolation, offered "all possible best wishes to Boris Johnson and his loved ones". Mr Johnson also visited the Northern Ireland Ambulance Service's HQ Newsnight is live in Westminister on Boris Johnson’s first night in Downing St. "European Commission President Ursula von der Leyen also wished him a "speedy and full recovery".For Archbishop of Canterbury Justin Welby, the news "deepens our compassion for all who are seriously ill" and those looking after them.And Mayor of London Sadiq Khan tweeted that St Thomas' Hospital had "some of the finest medical staff in the world" and that the prime minister "couldn't be in safer hands".During the government's daily coronavirus briefing earlier on Monday, Mr Raab stressed that the prime minister had been continuing to run the government from hospital.Asked whether that was appropriate, Mr Raab said Mr Johnson would "take the medical advice that he gets from his doctor". The government pretends it’s due to “pensioner pride”, but many are living with dementia, sick, can’t use computers and need personal help to claim. Mr Johnson will also highlight the additional funding for the Stormont executive, his support for a city growth deal and the five million pieces of PPE (personal protective equipment) that have come to NI from other parts of the UK.As he tours the UK, he is a salesman for the union and not surprisingly he has also used this trip to flag up Northern Ireland's centenary in 2021. Coronavirus: Too early to consider lockdown exit strategy, says Raab Coronavirus: Closing parks and open spaces in lockdown should be 'last resort' The Open cancelled; Masters, US Open & US PGA Championship rescheduled Airbnb hosts defy lockdown laws with 'Covid-19 retreats' On the fight against Covid-19 there are still worries that an influx of travellers from Britain could lead to a spike in the pandemic in Northern Ireland and the Republic - the new taoiseach sees things differently from his counterpart in London.