First i dont think that a Brit will get a Visa soon .2. you Need an medical Reason and fixed apointment For a Agreed Therapie ...and the Visa only For medical reasons may be an Extension on that...but Never After a retired Visa For Sure ...i think wait For For some Month to get the infectionen to Zero MAY Be the. The UK Will Be on the List of Exepted People ....NOT now
And you have to go directly into hospital quarantine ......