Firestone shaved over £100 off my wifes Vitara insurance, and dropped my 110
1989 from £160 to £120, both fully comp and included previous NCB.
Also try CIS (co-op) they are very good, but use a local rep to set you up (he comes to the door with your initial paperwork) so it can be a bit slow to get going. They also will accept your NCB, plus give up to 65% discount for new business
Also if ur Landy only does a low mileage, let them know, if U only do 506k per year in it, tell them, it drops the premium.. My £120 wuz using it as my main vehicle.
But keep shopping, the big insurers don't quite know what to do with us odd Landrover mob, so it's really worth digging into the smaller ones and the specialists