Retaining NCB?

[Strudul]

I've got a 2nd no-claim bonus discount, but haven't used it for coming up to 2 years as the car has been SORN, so trying to work out how best to proceed financially.

1) Is it worth trying to renew insurance on the vehicle to keep the NCB or let is lapse?

2) Can I renew for the year, then cancel after a day or month to reset the 2 year expiry timer or does it have to run for the full year?

TIA

[Dingu]

If you are older and have been driving a long time you may find it’s financially best to let it lapse.