Should you wish to spend a career adjacent to sunkissed tropical beachs fanned by dusky nubile maidens then take a few precautions with your NCB.
Buy an old rusty banger for £100. Insure it 3rd Party only for about £30/annum. Flog it to a scrappie (not a car breaker because he will want the documentation) saying that you've sent the papers off to DLVA. SORN it and keep the insurance up-to-date.
I knew somebody who did that. He used to have his UK mail sent out and his insurance would be renewed with his NCB entitlement every year. I will mention that he did not have or need a car where he was working.
You have to take a few other precautions as well.
Another bloke I knew worked in Sumburgh in the Shetlands. He was on a 2 and 1 rotation and he would park his green Cortina in a long term car park at Heathrow. He would remove the tax disc and when he arrived in Sumburgh he would put it on another green Cortina with the same number plates as the one in Heathrow.
Saved him loads.