On 19 November, the Department for International Trade published guidance that sets out how protection of trading interests (also known as the retained blocking regulation) will work in the UK from 1 January. The legislation protects UK persons trading with countries affected by the extraterritorial application of certain laws – these laws are currently US sanctions against Iran and Cuba. The intention of the legislation is to protect UK persons from the extraterritorial effect of legislation imposing the proscribed sanctions (i.e. the US sanctions).
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