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Many thanks both you. After the supplying dealer looked on their system and said, there's no alarm, just the immobiliser, I couldn't believe that to be true. So I phoned VW, yes they said, the alarm was part of the spec for the Match model. We rocked the car backwards and forwards but no alarm went off. Then we remembered that we might have disabled any alarm when our dear dog was with us, so that she didn't set it off. Sadly she died last year and it seems we forgot to turn the alarm back on. We found the switch inside the car, switched it on, and the alarm sprang into action. So much for the main dealer's info. Hopeless or what. What a fiasco this has been. Daresay we've only ourselves to blame.. but middle age does tend to render your memory not as efficient as it used to be .. that's my excuse anyway. Thanks again for your help.