Scourge of Traveller pony and trap racing: 'Cruel' sport terrorises motorists - while injured horses are dumped by the side of the road to die - but it's not illegal and police can't act without risking lives ○

Thundering along at high speed, a group of young people in chariots laugh and smile - yet this is no ordinary day out at the races, but rather a group of Travellers trap racing on public roads.