Wearing a helmet whilst driving

[mnkiboy]

Now today is comic relief. Wacky people all over the country are going to work in fancy dress, to annoy money out of their work colleagues.

This morning one of my work colleagues came in to the office stating she has seen someone driving a car dressed as 'The Stig', complete with full race helmet. He was driving an old Punto, which kind of ruined the effect!

There is some debate in our office as to whether it is legal or not to drive a car whilst wearing a helmet. Personally I think it must be legal, as i've seen people driving cars such as Caterhams whilst wearing helmets - why would there be any difference between a Caterham and a Punto?

So, helemt wearing whilst driving a car. Legal or not?