Stun guns and Tasers are illegal in the UK and anyone caught with one of the devices faces imprisonment for possession of a prohibited weapon. The maximum sentence is 10 years. Despite this, figures released at the end of 2015 showed police forces across the country had seized and destroyed hundreds of them that year.It is thought criminals often buy stun guns or Tasers on the “dark web” and have them delivered from overseas.Experts have also previously warned about the devices being disguised as mundane items, such as phones or lipstick.An investigation last year revealed that weapons, including a stun gun disguised as a handheld torch, were readily available online. In a separate case, a report claimed a lipstick-style stun gun could be bought for just £20.A spokesman for the Home Office said: “Our firearms controls are among the toughest in the world and Border Force works closely with the police and National Crime Agency to prevent the illegal importations into the UK.“Anyone caught trying to smuggle these devices into the country will have them confiscated and could face prosecution.” 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. Drivers have been warned of criminals using Tasers after a spate of attempted carjackings where suspects disabled their victims using the weapons.West Midlands Police urged motorists to stay vigilant as they stepped up patrols following a number of “Taser robberies”.In one shocking incident, a female runner was left with burns after she was attacked by three men in the affluent Kings Heath area of Birmingham. On Sunday night, two alerts were put out on behalf of West Midlands Police confirming that extra patrols were being conducted in the Moseley, Kings Heath and Springfield areas of the city to “combat recent Taser robberies”.The first urged motorists to stay alert, adding: “When in your vehicle ensure door locks are on and be aware of your surroundings when entering and exiting your vehicle.”The second, issued an hour later, confirmed there had been “several crimes” in the area involving suspects using a Taser. “Attempts to target lone females and rob them of their cars are amongst the crimes being investigated,” it said.