While so much in British politics is on hold to avoid leaving Europe, the government are proceeding with plans to make all bodies the possession of the State. In a short time, we will be presumed to be organ donors unless we take the trouble to opt-out:

https://www.bbc.co.uk/news/health-45056780

This has been the law in Wales for the last 3 years, so that those of us visiting Wales for the day have been in an ambiguous position: if there was a terrible road accident, would they check whether we were resident in Wales before taking our organs or after?