There are currently only 3 S Set rosters (during the Easter show):
17(8S) -MP only, 23(4S) and 24(4S).
L1 and L2 are currently rostered as A Sets due to the Easter show and may revert back to an S Set, however they may make this change permanent as the S Sets aren’t going to be timetabled from the 28th of April anyway.
Today there were 3 8-Car S Sets in service from what I know.
Run 17 (S113/S100)
Run 21 (S64/S99)
Run 38 (S145/S140)
There were no S Sets today on the Carlingford Line. Both runs 23 and 24 were both K Sets, and of course the Olympic Park shuttles were A Sets.
There were about a dozen S Sets stabled at FMC today. I was able to spot S28 at the back with 3 other 8- Car S Sets and a few more at the front including S69/S67.