Maz,

just remember that not tucking in at 'events' is a matter of practise. Over time, you will get into the habit of going to something like this and only taking the bare minimum.

So whenever you go near the food, remind yourself that you're creating a new habit, and this is the first step.

I have actually gotten to the point where I can drive up to a fast food place and automatically look for the healthy option. Or go to a buffet and robotically select the foods that will be best for me without even looking (or being tempted) by the 'bad' stuff. But it took practise. It's hard now but won't be hard forever.

Just keep telling yourself that tomorrow.