Tried Adrian Flux today for the 80, they won't quote on two counts.
1) Its an 8 seater, they can't quote for anything over 7 seats.
2) The vehicle requires a thatcham security system, due to the value of the vehicle (we all know how much a decent 80 commands these days, but it seems the insurance companies don't understand this)
Flux then put you through to another company (call connections), who then put you through.....etc......etc (read, don't bother).
One of the companies, (one answer insurance), quoted £865.99. Bargain........NOT!
The 80 is currently covered by the NFU, but they want £1016.17 to renew

(read, we don't want your business). I think we're over a barrel now, with this continuous insurance legislation

and the insurance companies know it.
I'm waiting to hear back from Chris Knott, they said "we'll call you back within 30mins", an hour and a half later I have a missed call from them. Tried calling back, but they're busy. Still tomorrow is another day.
The joys of shopping for car insurance.