I AGREE with P Webb (Letters, July 29) regarding the effectiveness of static speed cameras.

The east bound carriageway on Lances Hill, Bitterne, Southampton, regularly has a mobile camera van placed just before the static camera. Would this be necessary if the static camera was serving its purpose?

I have just returned from a 300-mile trip to Scarborough and there was not one static camera on the route other than on the motorway gantries.

Obviously some counties do not believe in them whereas I am aware of at least eight in the Southampton area.

J LINSDELL, Southampton.