Found a Mont Blanc pen in Waterloo Station a few weeks ago. Email me a description of the pen to confirm it was yours and we can arrange to reunite it with its owner!
(Sam on 15 Feb 2020)
When: 17 Mar 2020
Where: Waterloo or Westminster, London(51.5019° N, 0.1165° W)
I lost a Mul-T Lock key whilst out running: the only thing attached to it is my VauxWall membership tag, picture of tag attached. I was running from Waterloo across Westminster Bridge, through St James's Park, Green Park, and Hyde Park. I think I lost it somewhere around Waterloo and Westminster, but it could be anywhere in the park as well.

Could one of these be yours?