hi mate, im a professional cable installer. if this problem came up in our area (bournemouth) and it has before, the installations team can ring the police and have the vehicle removed from the pit in the road or on the pavement. i have had to do this on one occasion to get the installation finished. a bit extreme i know but the car is interfering with your work and can be moved. i dont know if this is something to do with the local council or not though
cheers