Can the dvla/ncp take your car without giving notice?

Question

it was broken down and sorn, it was'nt being driven or used,

Answer 1

YES, if its untaxed  and on a public road they can tow it away and impound it until the tax and fine is paid (if its insured) or if its uninsured they can and do crush the cars!

this is to encourage  you to MOT, insure and Tax your vehicle like the rest of us!