What is the difference between an informal and a courtesy crossing?

A conventional informal crossing is a place such as at a centre-of-road pedestrian refuge or at a triangular island at a traffic roundabout where pedestrians are helped to cross the road. Drivers are not expected to and seldom stop. Pedestrians simply wait for a gap in the traffic and then cross the road. Courtesy crossings are designed to encourage drivers to want to stop. Pedestrians wait until a driver has stopped and then cross safely.