A disabled mum has received a bravery award for helping to catch a pervert she saw sexually assaulting a drunk woman - by tackling him in her WHEELCHAIR. Heroic Kirsteen Johnson, 45, was coming home from bingo when she heard "muffled noises" across the street from her home. She approached a path off Station Road, Spondon, Derby, and was alarmed to see a man with his trousers down and his hand over a woman's mouth. She said she asked the woman - who appeared to be drunk - if she consented to what was happening. When she said no, Kirsteen, who uses a wheelchair due to nerve damage, dragged the man off her before he fled into the night. Kirsteen, who works for ASDA and an arts therapy group, said: "He was exposed and her trousers were down.