Hey guys iv got a grande punto 56 plate, we've recently change the alternator as it had packed in and put a new battery on and everything was fine, except the last 2 mornings when I go to start it it's completely flat, the centre light was turned off so I know that isnt the problem lol and i haven't done any mods to the radio/sound system, any idea what could be the problem?

Hi there, Welcome on board !

Make sure everything is on correctly. Loose wire could be the problem.