Q&A: David Cameron and the EU summit on the eurozone

Twenty five of 27 EU countries are joining a new treaty on fiscal discipline, aimed at avoiding a repeat of the eurozone debt crisis. The UK is not one of the them, after Prime Minister David Cameron effectively vetoed an EU-wide treaty change in December 2011. Here is a guide to what happened.

What has happened?:

Why did David Cameron refuse to sign up?

What else did the UK government demand?

What does it mean for UK financial services?

Who is responsible?

What happened next?

What is the agreement other EU states are pursuing?

What is the row about EU institutions?

What does it mean for the coalition?