North bound there is a Truvelo in a 60 (after the Biggleswade North/Old Warden Roundabout). Then there is a Gatso in the 50 just before the Sandy roundabout.
Southbound there is a Truvelo in the 50 before the roundabout, a Gatso after it and another Truvelo further south when the limit becomes 60 again.
The worst bit is they have the habit of putting a camera van in between the fixed cameras.
North bound it can be either south or north of the Sandy Roundabout.
South bound it is to the south of the roundabout and about 100m before the limit goes from 50 to 60. So if you start to accelerate a bit too early, they get you.
Just don't ask how I know
