On 11/05/2013 00:55, geoff wrote:
....
SPECS cameras work in pairs on one lane IIRC - they shouldn't detect you
if you move from one lane to another BICBW !
....

An outdated myth. The latest average speed cameras can link up to 1,000
different cameras and work out your average speed between any of them
anywhere in the country.

Colin Bignell