>otherwise does it really make a huge differance ?
Not really. I was just afraid that the photos could be "Oh my goodness! The photographer is coming in today and we haven't got a complete version of Mk1 coach type xx. Here pull the bogies off that one over there and shove them underneath; no one will notice".
Whilst I do not worry too much about the bogies under the coaches, I do like the numbers on the coaches to at least start with the correct region code. Bachmann do seem to vary the numbers and regions a bit, but if photos are not truly representative, the catalogue isn't really worth as much as it could be.
Thanks for the info by the way.