UNLIKE your correspondent Allan Ramsay, I see nothing wrong with SatNav systems alerting drivers to the location of speed cameras.

Speed cameras are placed at accident blackspots to encourage drivers to observe the speed limits there. Drivers are made aware of their presence by warning signs. All SatNav systems are doing is duplicating the work of the warning signs, helping ensure that the speed cameras achieve their purpose of moderating traffic speed. Nothing wrong with that.

Unless, of course, the the real purpose of speed cameras is not to make traffic blackspots safer, but to catch drivers speeding, and thus raise revenue for the authorities. Surely not!

Geoffrey Breakell, Whitsters Hollow, Bolton