Peugeot 307 wont start

Hi, my daughter had my key fob for my 2002 307 2.0 diesel. She must have been locking and unlocking continually until I got the key off her, at which point she was just hitting lock button continually. I could hear the car horn beep outside to signal deadlocked. Anyway went out to car, all electrics works including locks, but now the car won't start. I think the battery is fine, it's as if something is preventing the car starting, like an immobiliser or something. Anyone any ideas?

 

have you tryed locking the whole car up with the remote control & then unlocking it also useing the R M C & see if it will start then