shaun ingram booked his ford focus st in for a major service and mot at halfords autocentre in plymouth last month , costing £ 255 .
but when he went to collect his car , he was shocked to discover that a mechanic had taken it for a spin after his dashcam recorded footage of it being driven at 57mph in a 30mph zone .
shaun ingram , from saltash in cornwall , who discovered the footage , says that his camera recorded almost seven hours of footage , which included the mechanic swearing and boasting about test-driving the car .