EU leaders are expected to hail a breakthrough in efforts to strengthen integration in the eurozone.
However, decisions at the EU summit in Brussels to set out a range of checks and balances on eurozone banks also raise new questions about a two tier Europe.
British banks will not to subject to the new centralised scrutiny, continuing to be supervised by national authorities.
Most of the other nine non-eurozone states are considering whether to submit their banks to the new economic crackdown.
Only the UK and Denmark are able to formally opt out of joining the euro.
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Donald Trump has branded those who take part in terrorist acts as "evil losers" in the wake of a suicide attack at Manchester Arena.
Live ITV News coverage after the explosion at Manchester Arena following a pop concert by US singer Ariana Grande.
What separates us from the terrorists is that we air our grievances with non-violent debate though our democratic structures and processes.