Why?
Why on Earth would you want to?
If you want to join BA they won`t take you unless you have a UK ATPL - trained in the UK too I think. (well obviously, or it wouldn`t be a UK ATPL
)
As the UK is part of the EU, whether we like it or not, you already have an EU licence.
Or is it that over there in EASA mainland Europe they regard the British ATPL as the best? It bl
y ought to be at the amount it costs!!