[atlantean]

Just took my 240 GL estate for an MOT, failed on 2 corrosion points. suspension mounting offside rear and nearside rear wheel arch. Was a bit surprised as there was no mention on last years MOT (different owner) about anything rust related. Had a look myself and admittedly doesn't look great but wondering if anyone here with experience would confirm if it's really that terrible.
Guy also said their welder said it would be at least 500 quid worth of work which seems a bit excessive, never had to tackle this kind of problem before though so I don't know.

What do you think?
Also if anyone knows a reputable, reasonable welder in South London or anywhere in London that would be fantastic
many thanks