Meanwhile, two prisoners at HMP Bullingdon in Oxfordshire are being held in isolation as they are tested for the coronavirus - and access to that wing has been restricted.The prison, which has capacity for 1,114 inmates, remains operational. Thai officials have told Sky News that they do not belie who was transferred to the UK, had coronavirus when he left the country. Prime Minister Boris Johnson has said that anyone concerned about the coronavirus should "simply take the advice" of the NHS. He added: "We are a great country, we have got a fantastic NHS, we have got fantastic doctors." The British man believed to be a "superspreader" of the coronavirus has said he has fully recovered after being diagnosed in Brighton on 6 February with COVID-19. Steve Walsh contracted the virus while at a business conference in Singapore before going to the French Alps for a ski holiday, and then returning to his home in Hove, East Sussex. The 53-year-old appears to have unwittingly infected 11 other Britons who were in France with him. Five of those Britons are now in the UK, five are in France and one is in Majorca. He is still in quarantine at St Thomas' Hospital in London, and said in a statement: "I would like to thank the NHS for their help and care - whilst I have fully recovered, my thoughts are with others who have contracted coronavirus." A total of 174 cases have now been identified aboard the Diamond Princess - a British man who was on his honeymoon is among them. Health officials have been conducting medical checks on all of the ship's 3,700 passengers and crew - but a quarantine officer is among those who have now fallen ill. A total of 78 British passport holders are on board the luxury cruise liner, and a 14-day quarantine continues. A second cruise ship, which has been refused entry into several ports but does not have any cases of the virus among those on board, has now been given permission to dock in Cambodia. Stock markets around the world surged to record highs on Tuesday after.