Network Rail has issued a safety warning amid a rise in trespassing on rail tracks, with CCTV footage showing cyclists stopping to take a photo in the middle of a level crossing in Reading.The footage, recorded on August 26, shows one person sitting down on the railway tracks at the level crossing in Holybrook Linear Park while another person takes a photo.The crossing is used by up to 130 trains a day, travelling through at up to 100 mph, according to Network Rail.Network Rail said it has seen a “concerning” rise in the number of trespass incidents, especially on the firm’s western route, running from Penzance to London.In many instances, children and young people were involved, Network Rail said.“Fast-moving trains, slippery lineside conditions and unsteady ground combine to create a serious risk of devastating life-changing injuries, or loss of life,” the company said.Several instances of trespassing have been reported to the British Transport Police, Network Rail said. Credit: Network Rail via Storyful