What was it in the garage for? Could they have upset the fob or the car battery?
Sounds as if the fob battery is duff or has become unsynchronised.
On some Astras, apparently if you put the key in the ignition and turn it so the dash lights come on and press the lock button on the fob its meant to re-sync the key to your central locking.
ChicksFan
December 2011
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