On 27 October, Bright Line Law published an article which considers the scope for enforcement of OFAC designation against UK persons. In certain scenarios, a US sanction will operate to prevent persons in the UK from dealings. But although there is a need to tread carefully, assisting a person who is OFAC designated in or from the UK, including in relation to property, is possible as long as key points are remembered.
I had omitted the following link (as it did not seem to generate much interest!), but it seemed time to add it again and say that, if you would like to make a (polite) gesture and help me with my removal and computer costs, I have a page at https://www.buymeacoffee.com/KoIvM842y