If you do not use your vehicle for a longer period of time, you are still responsible for the obligations associated with owning a vehicle (liability insurance, valid MOT (if applicable) and motor vehicle tax).
If you are unable or unwilling to do so, you can discontinue these obligations. This is called suspending. The vehicle may therefore not be on public roads. And that facet is estimated very broadly. If you do not terminate the obligations, you may receive one or more fines.
A suspension lasts a maximum of 1 years and starts on the day that you register the suspension. After 1 year the suspension ends automatically. He becomes NOT automatically renewed. And if you let it expire for a day without being insured or (if necessary) provided with MOT and holder status? Even if you can indicate that your restoration project is in 1000 pieces and not ready?
Then, as mentioned, you have a good chance of a fat ticket. Because the State wants your money.