Want the best of The Telegraph direct to your email and WhatsApp? Sign up to our free twice-daily Front Page newsletter and new audio briefings. Emily Hartridge, who became the first person in Britain killed in an electric scooter crash In a crackdown following her death Metropolitan Police officers caught 100 illegal e-scooter riders in London.The Metropolitan Police said that people caught driving the scooters are usually given a warning, but 10 were fined and had their vehicles seized in the crackdown across the capital.E-scooters are similar in design to a traditional child’s scooter but are powered by an electric motor and can reach speeds of more than 30mph. A spokesman for Thames Valley Police said: “We are appealing for witnesses after a man was seriously injured while riding an electric skateboard in Stoke Row, Oxfordshire.”The incident happened on the main road, which is unnamed, in the village of Stoke Row on Wednesday, July 17 at about 7.30pm.”The victim, a 38-year-old man, was riding his skateboard when it is believed he fell from it, causing him a serious head injury.”He was taken to hospital by air ambulance for treatment where he remains in a serious condition.”Investigating officer, Police constable Mark Dunne, of the Serious Collision Investigation Unit, said: “I am appealing to anyone who saw this incident, or who saw the victim using his skateboard prior to the collision, to get in touch.”I would also like to speak to any drivers who have dash-cam footage relating to the incident. If you can help, please call Thames Valley Police on 101.”Grant Salmon, the bar manager of the Cherry Tree Inn in Stoke Row, paid tribute to Mr Visser, describing him as “a lovely guy”.He said: “He used to come in regularly and buy everyone drinks, including the staff after they had finished their shifts. A man has died in hospital after being seriously injured when his electric skateboard crashed in Oxfordshire, raising further concern over the use of electrified scooters and boards.Bradley Visser, 38, was taken to hospital by air ambulance after suffering a serious head injury when he crashed on July 17, but died of his injuries ten days later – becoming the first person thought to have been killed while riding an electric skateboard.The crash happened while Mr Visser, from Stoke Row, near Henley-on-Thames, was riding along the main road through the village. It is not thought that any other vehicles were involved.Mr Visser’s death has once again thrown the spotlight on small motorised vehicles, such as e-scooters and skateboards, with police and Government officials repeating warnings to users that they are illegal on public roads and pavements. Along with electric skateboards they are increasingly being used for short journeys in a number of cities in Europe and the US, but can only be used legally on private land in the UK.The Department of Transport last night repeated its warning about the use of electric scooters and skateboards.It stated: “It is illegal to use a powered transporter in spaces which are set aside for use by pedestrians, cyclists, and horse-riders. This includes on the pavement and in cycle lanes.“Any person who uses a powered transporter on a public road or other prohibited space in breach of the law is committing a criminal offence and can be prosecuted.” “He would always have some fun, he would talk to anyone pretty much. He would either come himself or with his family. His widow came in when he was in hospital putting a brave face on it, it’s a terrible thing.”I used to see him riding the skateboard to and from work, but he would never bring it to the pub.”Another neighbour said she frequently saw him on his skateboard or driving around the village in a go-kart style buggy. “It’s sad it’s come to this,” she said.The use of battery powered scooters and similar devices has become increasingly fraught in recent weeks, following the death of TV presenter Emily Hartridge while riding one in south London.The 35-year-old YouTube star became the first person in the country to be killed while riding one after she was struck by a lorry in Battersea last month. Metropolitan Police officers in Islington, London, talk to people about the risk of riding e-scooters, which are currently illegal to use on public highways, including pavements.Credit:Yui Pok/PA E-skateboards, which cost upwards of £900, are powered by a small electric motor attached to the rear wheels, which is controlled by a wireless handheld remote, and can reach speeds of 25mph.Thames Valley Police said it was carrying out investigations into Mr Visser’s death on behalf of the coroner, and his next-of-kin were being supported by specially trained officers.Mr Visser, a specialist furniture maker, is understood to have been a married father of two, originally from South Africa. His Facebook page carried several photographs of skateboards.