I very stupidly left my windows open last night which meant that the interior of my car got a good soaking.
Unfortunately a possible side effect of this is that my central locking can no longer be activated remotely using either key. If I use the old fashioned key to get inside the alarm goes off until I put the key in the slot and then the car starts as normal. The central locking works fine from the switch in the centre of the dash.
I am trying to avoid a trip to the dealer but it looks like it may be my only option.