Lorries make up just five percent of London's traffic but they are involved in half of the city's cyclist deaths.

Between 2009 and 2012 53 cyclists were killed on London's roads, of whom 28 had been hit by lorries.

Sat-nav or GPS devices are increasingly popular with drivers looking for directions, but Caesari said this was the first to give warnings that cyclists could be approaching.

The Navevo system works by providing visual and sound alerts to lorry drivers as they approach roads popular with both cyclists and heavy goods vehicles (HGVs).

The list of 100 danger spots is based on data provided by Transport for London, the city's transport authority.