Brilliant, thanks for that. The handbook talked about a cancellation switch but we've searched the boot for it and the car was originally owned by an 80 year old who wouldn't have thought about switching them off. He was very proud of his parking sensors and gutted at having to give up driving (I got the car at nearly 2 years old with only 2636 on the clock) so I didn't want to upset him by trying to find out how to switch them off. Part of the reason I want to be able to switch them off (apart from the annoyance factor) is that I'm toying with the idea of fitting a tow bar to transport the kids bikes around. I have roof bars for taking a box when we go on holiday but the indents that should be in my door frames to fit the bars aren't there and I have to get the measuring tape out every time I put the bars on (I lose my great fuel consumption if I keep them on all the time) so a tow bar would be easier.