All part of the NatEx reshuffle, the new 350s will allow CT to return SLs 321s which means ONE will get back thier 321s (currently with SL). Which will mean ONE will return the 5 357s back to c2c.
The 317s that have returned from Thameslink will be used on ONEs new Stratford-Stansted service when that service starts in December (ruling out 322s returning to Stansted!)
Hull Trains 170s are now in Scotland and are being used to strengthen existing services, like replacing a 158 working to a 170 working for more capacity. FSR have already re-liveried them in FG purple/pink livery!
The 322s are currently sitting in IL depot, Ii haven't seen them being used in servcie for weeks now, usually they are on Southend Trains working with 321s