Uderbody Rust

I have a 97 V8 Discovery Mk I ES. (117,000 miles)
It has just failed MOT with multiple areas of underbody rust (rear cross member, sills etc.) and the servicing garage have said that it will cost many £hundreds in welding.
This is otherwise a good high spec vehicle with LPG installed but its low market value limits what I should spend on repair.
I am in Kingsbridge in Devon. Can anyone please help me to find a local lower cost welder who knows these vehicles for this job? or maybe advise me of the right course of action to take - scrapping it would be a crime and I cannot be without a vehicle.

weld it up yerself

Why does a low market value limit what you'd pay to fix it if you're going to keep it?

If you like the rest of it a few hundred quid will keep it going for a few more years and it's not now likely to lose much more money, especially if/when the scrappage scheme is changed or removed and 2nd hand prices recover a bit ..

buy a mig welder learn to weld its not rocket sceince

yep.. that's what I've done.
Bought a MIG and learnt how to weld... if you own a landrover is likely the mig welder will see a lot of action.

If you dont want to learn and dont want to weld..cough up the money, but be prepared, because its expensive.
Or... just sell the disco, being a 97 V8, with no MOT, you might get £400 for it..

hate to blunt but JP has it in a nutshell - depends how much you like the car and whether you've got space to do the work.

Im with JP on that one two! Just learn the art of welding bodgery and sort it out your self, Im currently in the thick of welding my 97 Disco up for the MOT, New sills and extensive Floor pan work on the drivers side, bloody big holes!! Would explain why I got loads of water in the foot well when Ive been out playing! Lol!! The way I see it is if I do a good job then I'll be trouble free ish :hysterically_laughi for the next few years!