Does the S3's alarm/immobiliser give it any Thatcham rating? Searching for insurance and the cheapest one is subject to to the vehicle being fitted with a Thatcham level 1 or 2 security device. Anyone have any ideas on how much a thatcham 2 device would cost to get fitted? The quote is only around £80 cheaper so doubt its worth getting one fitted. Also what is thatcham 2? I remember having a thatcham 1 fitted to an old car which was an alarm and immobiliser. Is thatcham 2 just an immobiliser?