London is a highly housing-constrained city, so the most important way of answering this question is, what affect did freezing Russian oligarch money in Jan 2022 have on the London housing market? If it made housing cheaper or otherwise more available, it was good for the average Londoner; and if it did the opposite it was bad. I have no idea which effect dominated or if it even made an appreciable difference compared to everything else that affects the London housing market.