reporter: 8596 of disabled people using this vehicle have said to havej complained about its unpredictable behaviour on the road. they were not reliable, they were unstable, they were fundamentally unsafe. the fact that it was a single seater meant in your formulative teenage and 20s years, it was a very anti—social method of transport, because you know, when you started to form friendships with girls and what have you, i was a bit of a rebel, i can't say with my hand on my heart that i didn't sneak a young lady in my car on more than one occasion. she'd sit where the wheelchair, she'd sit, on the floor, very uncomfortable, totally no padding, no seat belt, totally unsafe. reporter: the campaign to get| invalids onto four wheels instead of three switched in october to tower bridge. i did take part in a protest against these vehicles. we were looking for the government to consider issuing a regular,