I spent most the day at work reading up on different models and came up with 4 beeps is the bonnet sensor. I unscrewed the sensor and it is knackered, one of the cables was just bare wire wrapped around the earthing part of the sensor, pulled it apart set the alarm and touched the 2 together, and when unlocking it it gave me 4 beeps so i think it could be solved. If it goes off again today then its onto the interior sensors. Cheers for the help mate!