Isn't the UK also the home of the "Rule against perpetuities" [1] specifically stopping dead people from exerting control over the ownership of private property? To stop some duke in the 1600s setting inheritance rules for "their" land 6 generations into the future?

There may be exceptions to the rule against perpetuities for charities, but I don't imagine any sane court would consider keeping a corpse frozen to be a charitable activity.

[1] https://en.wikipedia.org/wiki/Rule_against_perpetuities