FCC didnt do a lot to 317 and 313s..The 313s were refurbished by WAGN around 1998-2000 (roughly IIRC), following on from the 317/2s. The main change was the high-backed seats, but there were a few other alterations including passenger door control. Originally they were planned to get carpet, however this idea evidently got dropped before any units were done. For some reason the WAGN refurbishment didn't introduce a new livery, possibly because they were planning a differentiated inner-suburban livery which never happened, so for a few years the 313s ran around in white undercoat, a few units gaining adverts in the process. After a few years the units gained the WAGN plain purple livery, which the 317s also got. Under FCC the 313s gained new seat covers, new lino flooring and external vinyls - which is basically how the units are now, pretty much untouched for approaching a decade.
The 3x 313/1s have a slightly different history in that they had a less extensive refurbishment carried out by Silverlink in the late 1990s which was little more than an internal repaint and changes to grab poles. FCC didn't do much to them apart from repainting, new seat covers and (?) new flooring.
Agreed that the WAGN moquette was rather nice, although it wasn't unique to WAGN as the 16x Connex 365s had it from new as well, so originally it may well have been something chosen by the leasing company - WAGN then using it further in an effort to make their other fleets mimic the 365s (the 317/6 refurbishment was definitely designed to copy the 365 in many respects). Actually IMV the original red and green 365 interior was one of the best ever - very warm and cosy in winter whilst relaxing in summer. Much nicer than what the 365s have now, and IMV preferable to the FCC scheme which always seemed/seems rather dismal and depressing. Not sure why the 313s have always resolutely kept the yellow round the doors, unless perhaps it has something to do with the tunnel running (although why would it as these doors aren't an emergency exit in a Tube tunnel?).
southern 313s are dire in my opinion and not fit for Brighton to Portsmouth servicesThat's interesting reading but I was actually referring to the point that the refurb that Pre GTR Southern did on the ex London Overground 313s pretty much made them like new trains, they were a world apart from the London Overground and WAGN/FCC interiors.
And quite surprising I actually do agree with you on the original red and green livery that the 365s used to have, that was the best livery they had period!
It's just a shame that the fleet got dumbed down the way it hasI even remember the FCC 317s having carpets though out even in Standard Class until it was decided to do away with them except in 1st.
Back to the 717s though, it be interesting to see what people think of them as compared to the 313s when they finally enter passenger service.
I am not keen on the seating layout either