If those pictures are the worst it gets, then I wouldn't panic too much.

Try making sure it's all dry, and there is some integrity to the joints, i.e. not just a couple of cm of rust an nothing else.   

Next, put some decent quality, high viscosity, water-resistant grease on there and all round the CV boots too.  In fact every vulnerable bit, except the face of the brakes,  on or round your exhaust or other hot bits.

 :inferno::inferno::inferno::inferno:

This will prevent it rusting up too much and will stop too much mud sticking to the struts, which also causes rusting.

Try:

http://www.motuk.co.uk/mot_testing.htm

The MOT isn't rocket science, as pointed out earlier, it isn't really about mechanical fitness.  It is just about ensuring your vehicle meets the minimum safety standards.  We are talking major chassis rusting, holes in columns or mounting areas that cause failure.  Not a but of orange on the sills.  Look under most cars, horrible.