Car Failed MOT today but should it have passed last year?

[audicoup]

I took my coupe in today for it's MOT, only to be completely shocked when I was told it failed and would cost about £400 to put right. I was fairly convinced it would pass so this came totally out of the blue and the list to be honest was quite scary. This is what it failed on:

n/s outer sill body or chassis has excessive corrosion, seriously affecting it's strength within 30cm of the body mountings

n/s inner sill body or chassis has excessive corrosion, seriously affecting it's strength within 30cm of the body mountings

n/s (trailing arm mountings) body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings **DANGEROUS**

o/s (sill) body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings

o/s (trailing arm mountings) body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings

_____________________________________

Now the problem I have here, is that the car passed an MOT last year without so much as a mention of any of this (it was MOT'd at a different garage that we no longer use) and not mentioned on the advisory either. The car has done 2,700 miles in this 12 months and it was garaged from October until this morning (except for the odd run round the block)

I don't think it should have passed last year (although this is just my opinion) but I am after other peoples opinions on whether this sounds right or not before I call VOSA tomorrow.