I've just managed to do the same thing and knock my rear view mirror off the glass, but think I've also managed to damage the sensor in the process.
Anyone any idea how much it's likely to cost me to replace the sensors and repair/re-glue the mirror?
Also, any suggestions about a good workshop in the Sussex area who could do the work? The windscreen itself is not damaged and so I want to avoid having to replace that, if possible. Cheers!