If you want to sell a damaged car you can. Granted you do not have many places where you can sell it, but you can definitely do so. You will of course get less for the car than you would if you were...

Driver and Vehicle Licensing Agency (DVLA) must be notified immediately whenever you sell a vehicle.  They must be notified of the exact date that the sale and transfer were completed by using the car...

If your vehicle won't start do not immediately call a breakdown firm