They were Mitch Treliving, 19, believed to be the driver, Aaron Sharpe, 20, and his sister Catherine, 18, Danielle Billingham, 17, and Gemma Smoker, 17. All were from the Crawley area. Dozens of 999 crews were called after shocked witnesses had battled in vain to put out a blaze caused by the cars exploding on impact. Emergency services said it was the worst crash in Sussex for many years.