Ok.

Willy is a little unhappy at the mo. It starts most times tbh but every so often when i turn the key and starts but tries to cut out half way though if u no wot i mean. Only happens once every 2 days or so....

I do have a ****ing annoying exhaust that is proper hangin at the mo that tbh i want to get shot of cos its bugging the hell out of me. That wouldnt casue start up probs if the hole was big enough no? (Thinking about that thats a stupid idea)

Starter motor?