The problem with this strategy is that the major trading blocks of USA, EU and China will not allow the UK to undercut them. So if the UK goes down this path, then companies based there will find themselves cut off. The UK domestic market is not large enough on its own.
China is even more controlling than the US.
London used to be the center of finance in Europe and now the EU sees an opportunity to grab that revenue / power.
Where does this leave London?
And the UK as a whole is heavily dependent on London.
I think you'll find it still is, by quite a long way
> now the EU sees an opportunity to grab that revenue / power.
the EU hasn't even managed to pry Euro clearing out of London (despite trying extremely hard)
and it'll be pushed back again
China is not relevant.
You're not making a convincing point, IMHO.