The only thing you have to worry about is a Crustal Displacement.
This is where the entire crust shifts round by any distance it chooses. An inbalance of ice sheet on either pole wil cause this to happen.
When it happens, pray it moves the UK closer to the rotational equator.
If its a quick shift, anyone in the building trade will have a 'job for life'; and folks who live above 350ft elevation will stay dry.
Cheerio London, Manchester, Liverpool, Southampton, Edinburgh, Glasgow; Hello Birmingham, new capital of Great Britain