One well placed Tory said: "There is virtually no hope of changing the main institutional architecture of the EU once Lisbon enters into force. If the treaty enters EU law you will find that a Conservative government will want to focus on repatriating powers that affect the UK. This is not going soft. If other EU leaders say they will not accommodate us, then we have the threat of a referendum on our reforms."
Cameron gave a hint of his plans when he appeared on the BBC's Andrew Marr Show. Asked what powers he would like to repatriate, he said: "We've said that we think that the social and employment legislation, we think that's an area that ought to be determined nationally rather than at the European level. There are many things in the Lisbon treaty – giving more power over home affairs and justice – that we don't think is right."
David Cameron retreats on European referendum | Politics | The Guardian