For weekdays, diagrams IW11, IW12 and IW13 have now all gone over to IET operation (Today all worked by 9 car IETs, though 1A02 on IW12 was a HST then swapped to 9 car IET).
Diagrams IW1 - IW10 still HST but more will be going over to IET over the next months.
Weekends, diagrams IW11 and IW12 on Sat and diagrams IW11 and IW13 on Sun should be going to IET from the 17th too.
This means no more weekday and Saturday HSTs to Swansea, but diagram IW10 (1B35 and 1L86) on Sunday isn't due to go over yet. Although, this diagram isn't operating as per the WTT for a few weeks due to engineering works.