'Most unusual' vehicle stopped on M25 in Hertfordshire
A traffic policeman described a homemade motorcycle as the "most unusual vehicle" he had stopped in his 26 years in the job.
The officer tweeted that it was "all checked and in order" but he was "not convinced" he knew what it was.
A police spokeswoman insisted that the vehicle was actually approved and registered by the DVLA.
Another officer described the vehicle as "made from bits of balsa wood and duct tape".
Sgt Stephen Andrews, from the Bedfordshire, Cambridgeshire and Hertfordshire Roads Policing Unit, said: "This is certainly not a vehicle that is seen very often on our roads but after road side inspection we couldn't find anything that would prevent the rider to continue his journey.
"The vehicle was keeping up with other traffic and didn't cause any obstruction to other road users.
"The owner made sure that he fulfilled all the safety regulation as well as keeping the insurance, MOT and tax in date."