dan, regarding FCC and NXEA, yeah it is just Cambridge - Lynn that we're valid on although they're only 2-3 a day, although you do have the ex-Anglia Cambridge-Norwich as far as Ely too!
Also regarding EMT, I had previously been told, and had seen it written down that the agreement was Bedford-London only, however, I have further had it confirmed, that the residential agreement stretches over the entire network. Now, I'm not sure if this is the ex MML network, or the entire EMT network, but it is residential only.
Sleeper:
No Staff Travel Facilities may be used whatsoever in the seated portion of the Caledonian sleeper.
This does not apply to the FGW Night Riveria, where there much greater availability of seated accomodation.