Hi, It wasn't denied, I got my K1 Visa on March 14th 2020 - days later the travel ban was put in place - and in August of last year it expired before I could use it.
On section 3.12 of the Visa FAQ's it details how to get the Visa reissued. So i've already completed a new medical and I'm just waiting now for the embassy to get back to me. I just wondered if anyone else has done this ins London and would know what the process is.