I purchased a selection of different coaches, to give me the most appropriate base models for the construction of my Network Rail Infrastructure Monitoring Train.
All coaches used are Hornby, to keep the cost down; Plus if I used Bachmann you would be removing extra details that aren't needed, but you've paid extra for.

Network Rail - Model Type
9703 - BSO
977868 - TSO
1256 - FO
977985 - TSO
977986 - FO