Covid tests before going clubbing or to the theatre.Boris Johnson hinted at testing as he discussed a new approach to allow nightclubs to finally reopen after a year of lockdown.The leader also announced on Monday that the UK is set to have offered every single resident over the age of 50 a Covid vaccine by the end of April.However, some industries remain concerned over their likelihood of reopening, with the possibility of private businesses asking their staff and punters to have a vaccine or be denied entry.Although it was rumoured "vaccine passports" may be necessary in day to day life, on Monday, Mr Johnson downplayed the prospect of such "vaccine passports" in the UK - except for allowing international travel.Instead he suggested some.