There was an attempt to write a 'Constitution', which the UK vetoed as an attack on natonal Sovereignty generally. But most of the words in the big draft were then imported into the Lisbon Treaty with its 'ever-closer union' ambition on page 1. (I know because in the job I had then I had to compare the two texts word-for-word, then get on Eurostar). This time, Cameron got the promise of a derogation on the 'Union' bit, but it wasn't enough to persuade us Brits who only had ever voted for a 'Single Market' (and didn't get even that, at least in my sector). Today we're celebrating with (French) champagne.