i'd actually hold off demanding a return of your passport, as that might engage a fifteen delay response of its own... Not forgetting that at present, there is further interest in UK-Russia relations due to odd substances getting into contact with the public The possible additional delay of 15 work...

I was told it was not available

I am writing this in the moment of complete desperation and utter helplessness due to the fact that UK embassy has been holding my passport in unknown to me location for over a month and I can’t even travel back home for my sister’s wedding. There is no way to contact UK visa and immigration people ...