UK Car Repair: mg zr 2ltr turbo, bty, mg zr

Question
came today car was making a tapping noise and when I tried to start it the car had no power at all, when I used a Bty from my other vehicle and connected it the alarms ect went off but car will still not start, tapping noise gone once I disabled the alarm?

Answer
It sounds like something drew the battery down, once it got low the alarm system registered a disconnection.  First you need a charged battery. You then need to trace where the clicking came from (if it is still there).  Now try resetting the alarm/security by using the key to lock the car then holding it in lock for a few seconds, next unlock it and hold the key in unlock for several seconds.  Now, remove the key and arm and disarm with the remote, the system should now reset.