Bikers have more accidents in Westminster than any other borough, new figures have shown.

In 2007, 424 bikers came to grief on the borough's roads, with two killed and 89 seriously injured.

Kensington and Chelsea came fourth in the table, with 244 mishaps recorded and three deaths.

Hammersmith and Fulham was also in the top 10 - seventh with 207 accidents.

In comparison, the borough with the lowest number of motorcycle deaths was Harrow, with just 32 accidents.

Transport for London is launching a spring safety road campaign to cut motorcycle deaths across the capital.

A spokesman said: "As the days get longer and the weather improves, thousands of people will be bringing their motorcycles out of winter hibernation for the daily commute into London."

It is using a series of television adverts to explain the optical illusion which means drivers underestimate the time that motorcyclists will take to reach them than larger vehicles, because they are a smaller object.

This is caused by the way the brain assesses approaching objects and it called the 'size-arrival effect.'

It makes motorcyclists vulnerable to other vehicles misjudging the amount of time they have to perform manoeuvres like pulling out in front of them.

TfL's head of the London road safety unit Chris Lines said: "Motorcyclists are among the most vulnerable of London's road users.

"In 2007 there were 4,856 collisions in Greater London involving powered two-wheelers and 944 of these collisions resulted in a death or serious injury.

"This campaign highlights just one of the ways in which drivers can come into contact with motorcyclists.

"However, drivers should look out for motorcyclists in all situations, especially during the commuting hours, when a high proportion of collisions occur."