Probably not a big deal.
"Abramovich’s visa is thought to have expired in April while he was out of the country, and he has not tried to enter Britain since. His new application would have to be made from abroad, probably Russia, which means he will be subject to slightly more rigorous criteria than if he applied from within the UK."
Source:
https://www.theguardian.com/world/2...-thought-to-be-caught-up-in-uk-visa-crackdown
P.S. Gotta love the Comedy Kremlin PR team. This admin delay is an
unfair and unfriendly action apparently. Poisoning and assassinations though, that's fine.