That's inner sill, pocket bottom, maybe floor (although you may get away with just the inner sill as it comes down onto the floor there), and probably the subframe mounting point (but the picture doesn't really show it). MOT failure right there.
You may also have issues with the outer 3/4 panel at the bottom, and possibly outer sills (if the inner looks that bad, the outer probably ain't pretty. Did you have a look at it while you were there?).
Are you gonna attempt the repair yourself, or get a garage to do it?
Its just not long passed its MOT.. Cowboys. The bottom looks ok, and the subframe was replaced for the Mot.. I was going to try and do something to fix it myself. Maybe a fibre glass kit thing that someone said i should do, but even they said that it would have to be welded for the next MOT.
This sucks.. :'(