Tony Blair will argue that the UK needs to stay "at the heart of the European Union - or face disaster" in a speech to business leaders on Wednesday, according to the Guardian.
The former Prime Minister will tell gathered members of the business community that membership to the EU is more important than ever. A source close to Mr Blair said:
"Whereas the postwar argument for Europe was about peace versus war, he will make the point that the 21st-century case for Europe is about power versus irrelevance."
The Prime Minister's performance at this EU summit has been interesting and it hints at a more tactical engagement with Europe.
The Prime Minister has hit out at EU institutions for not going far enough to rein in spending as budget talks were postponed until January.
Getting 27 people with different interests to agree to anything is hard, but the lack of solidarity among EU members can be striking.