Cyclists in the South of England are far less likely to be injured by cars, thanks to what researchers  say is a ‘safety in numbers’ effect.

In areas where cycling is popular, just one in 500 cyclists are likely to be injured in a year, rising steeply to one in 20 where few choose to cycle.

Road Safety Analysis carried out a study which found that the North of England was the riskiest place to cycle, with dangerous drivers being pinpointed in places including Rotherham, Chesterfield, Bolton, Leeds, Liverpool and Mansfield.

In the South and Midlands, safer areas included Wellingborough, Lincoln, Oxford, Cambridge and Winchester.

The findings will be presented at a safety conference in Bristol next week.

Road Safety Analysis sad: “more cyclists on the roads reduce collision rates”, and called for better cycle infrastructure in areas with fewest cyclists – a message contrary to the spending in major cities like London, where many people commute by bike.

Richard Owen, of Road Safety Analysis, told the Times that having more cyclists in a town forced motorists to adapt. “They learn how to drive safely around cyclists and expect to encounter them at junctions and adapt their behaviour accordingly.

“Another possibility is that more drivers are also likely to be cyclists and are much more sympathetic to the safety concerns of fellow road users.”

The research was based on Department for Transport data on road collisions and the number of people in each area who cycled at least once a week. This was set against the postcodes of injured cyclists.

The study found that Rotherham in South Yorkshire had the highest accident rate at almost 198 per 1,000 cyclists — almost 20 per cent — although the researchers said that the figure could be skewed by “anomalously low” reports of the number of cyclists in the town.

The next highest rate was in Chesterfield, where only 247 residents cycle regularly. About one in 20 are involved in accidents each year.