even some of the centres that are appointment only seem to be quiet the times i've driven past and there are 1 or 2 cars... and thats why welshpool is always so busy now because every1 goes there.
also you have to remember that all the inspectors are different, i've had 3 different inspectors in the 3 months of having my yellow .. lol .. and they've all picked on different things, even tho they should just stick to my original list! your car might be low, 1 inspector might care, the other doesn't have time to care...