The Pirelli Scorpions on the back of the Land Rover are the originals and after 3 1/2 years they look absolutely fine with no cracking on the sidewall. Had to change the fronts as they were worn out after 18,000 miles, I think that was more due to the tracking being out a bit and the way I drive! Discovery's are very sensitive to wheel alignment and you have to have a dealer do it as they have to program the air suspension correctly.
Have to say that I have never had an issue with any modern tyres on a car and I always go branded, GoodYear/Dunlop/Pirelli/Contis.
The best tyres I have ever had on a car were some Good Year Efficient Grips on the front of my wife's Honda Civic. Worst were some Kwik Fit Centour Supremes on the front of a Golf VR6!
The Dunlop Street responses on RUK (1850 auto) are extremely good, especially in the wet. I found the budget Marshall tyres on NWL (Sprint) before I started restoring her just booming dangerous! especially in the wet, roundabouts were fun though!
Unfortunately I am still trying to get Farnborough Value Tyres (through Balckcircles) to pay up and admit that they damaged a diamond cut alloy on the Land Rover, they refused to give me the keys back unless I signed off the work.
I'll be going to Land Rover next time as they told me that they would match Blackcircles as long as I have the car services at the same time. On the other hand I had a tyre place in Bordon damage one of the alloys on my VR6 when repairing a puncture, they told me immediately and offered to either refurb the alloy or just give me the cash or money off a pair of new tyres. I went for money off some new tyres as the damage was so small.