I understand that FGW have 12 142's - and there are 9 daily diagrams centered around Exeter. A few questions spring in my mind:-
1, How long will these units stay at FGW- some reports suggest till October, others say they are now staying until 2010!
2. Are they all in operation on a daily basis
3. What sort of place is Exeter station? Is it rail enthusiast friendly?
4. Is the depot at Exeter easily seen from that station?
Daily Diagrams: Don't think they cover all of the 9 daily Exeter local diagrams and one is covered by a 153 pair or a 150 normally. There are also some trains to Exmouth which come direct from Penzance i think and there is also one diagram that does PNZ-EXD then on to the yard before working an Exmouth later.
1) Think it's already been answered in a roundabout way.
2) Yes, working to Paignton, Exmouth and Barnstaple (Mon - Sun) and Okehampton (Sun Only)
3) Yes, although there are ticket barriers so if you are not traveling there by train you will probably have to get one of those photographers permit things i've seen people use at New St to get through the barriers.
4) Yes it is right behind the station and the platform in front of it is rarely used, although there is a HST that terminates there and sits in the platform at about 1130 I think. You can also got out of the station and over the crossing at the North end and walk round to the depot, just there are the sidings which are normally used by Serco trains but if you walk up to the car park you can see a few of the units.