Will exercise alone make you slim?

We’re currently in Portugal at the tail end of our holiday so apart from my nightly Fitness Challenge on Twitter, I have had a rest from blogging and most things to do with work. I feel rested, relaxed, I’ve caught up with my sleep and I’m now re-energised and ready to go back to work and get cracking again. Yesterday the Observer carried a feature headed ‘Why exercise won’t make you thin’.