Tony Blair is to intervene in Britain's Future in Europe and will warn that disengaging from the European Union's "top table" would be a disaster for the UK Economy, according to reports.
The newspaper reports that he will say because major economies such as China, India, Brazil and Russia are emerging as global competitors, EU membership has never been more important.
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.