I'd personally replace the crossmember, but then i have to tools to let me do it so it would cost ###### all. Depends if you'd need to get a garage to do it, as a repair will / should be cheaper. Thats assuming theres any good metal nearby.
I've found crossmembers on eBay for £16 new. What does it require to change it? Bolts? Or welding?
Thanks for your help guys!! Don't know where I'd be with out this forum
Depending how bad that corner is a patch might do the job...i've usually found if one corners gone then the other will either be close behind or will have already won the corrosion race.