Donald Tusk: EU summit is make or break

European Union (EU) President Donald Tusk says the summit of 28 EU leaders to decide on the reforms that the UK is calling for will be one of the most important the bloc has ever seen.

With many core issues still outstanding going into the two-day summit, Mr Tusk said as he arrived for the opening session: "One thing is clear to me. This is a make or break summit, I have no doubts."