The Rise of popular sentiment, and realisation that it was possible to blame poor services on immigration(from 2010 onwards) meant that this was a logical outcome.
Before that the UK was off and on reasonably good. (before the 70s anyone in the "empire" could live and work in the UK, something that the home secretary's parents used to escape persecution)
There is also a long history of Britain harbouring "terrorists" and political agitators, on humanitarian grounds, when doing so would help destabilizing competing (typically European) powers.
The Rise of popular sentiment, and realisation that it was possible to blame poor services on immigration(from 2010 onwards) meant that this was a logical outcome.
Before that the UK was off and on reasonably good. (before the 70s anyone in the "empire" could live and work in the UK, something that the home secretary's parents used to escape persecution)