The rear discs on my Focus were noted on my latest MOT advisory as well and they do look simular to the ones on the photos but not as bad but people have said to me that they are still good for at least another year.
Liam
I love advisories. Last time I used a different garage than I normally do they told me I needed new shocks, springs and axle bushes. Perhaps looking at them first before deciding to try and rip me off would have been intelligent. They must not have actually put the car on the ramps, they were a couple of weeks old at most. I pointed this out and took the car after paying them the MOT price. Took it to my normal garage rather than taking it back there, and they picked out a bit of welding that needed doing. I showed the guy the advisory notice, and he went ballistic.