Should over-70s face compulsory health tests before being allowed behind the wheel? After a spate of accidents involving elderly drivers, the Medical Minefield team investigate whether stricter rules are needed, talking to Nigel Lloyd Jones, who lost his mother in an accident involving his elderly stepfather behind the wheel, and speaking to Sergeant Rob Heard, a retired policeman and founder of the Older Drivers Forum, who argues that stricter rules are needed to deal with drivers (of any age) whose health makes them pose a risk to other motorists.