Hi Alan, big welcome to the looney (errm I mean Landy Zone) whats the service history ? Are you a DIY mechanic ? I do all my own, not difficult and saves a fortune over LR dealer costs.
make sure you change the engine oil per the schedule, and it will be good for an avg of 200k . . . worth getting waxoyled if it hasn't been done and you intend keeping for a while, and check for corrosion under the boot floor, front inner wings and rear wheel arches (the area you can see with the rear doors open . . . .
Apart from that, Disco 2's are pretty reliable and it should give you good service !!