Well, as we see the question is moot. It appears neither Cameron nor the liberals are prepared for us to do anything to upset our EU lords and Masters.
The interesting argument is that this is the wrong time.
What is the right time?
When there is no chance of the people wanting to leave I guess.
Personally, I'd think the time to leave a sinking ship is while the lifeboats are still afloat.
Cameron seems to think we should wait until the ship has stopped sinking and has sailed into calm waters with warm sunny weather. Of course, that means an awful lot of futile bailing because the ship of EU state has more holes than a colander.