Does the insurance database list it as a red hunter ?
It's possible that the registration has been sold onto a modern car ??
I think DVLA requires a vehicle/registration combination, which won't work if you don't know the vehicle make.
Alternatively, whoever has the bike has it added to their insurance policy for fire and theft purposes.
However, I was of the opinion that your insurance is void if the vehicle has no valid MOT ?
John "Josh" Nashwebmaster@arielownersmcc.co.uk
2009 royal Enfield,1978 t140 bonneville, '67 CJ750, 196-ish Ural M62 outfit, 1960 k750, ''51 kH500, ''49 soon to be Ariel bobber, 47 VH twinport, '44 Ariel WNG, '43 Ariel WNG, ' and piles of rusty scrap ....