During last week's heatwave, how did the Class 230 units cope with the high temperatures in North East Wales?
Looking at RTT the answer seems to be "not brilliantly", but they did run.
Monday: 2 x 230, 1x197. 1 230 round trip cancelled in the late afternoon evening
Tuesday: 2 x 230, 1 x 197. the 230s were swapped with other 230s during the day - several cancellations (initially due to "a problem with the train crew" - thereafter "due to a late arrival"...)
Wednesday: 2 x 230, 1 x 197. Normal service - no swaps.
Thursday: 3 x 230. Several cancellations, particularly late afternoon and evening.
Friday: 3 x 230. Several cancellations and no evening service.
Saturday: 2 x 230, 1 x 197. Full service (albeit with some late running)
Given the previous vulnerability of the 230s to overheating I'm not entirely surprised that they seem to have struggled a bit in the higher than normal temps, but I'd be interested to know what the problems actually were, and whether TFW were being a bit cautious and pulling them before things got serious. There were certainly many cancellations across TFW services elsewhere due to "more trains needing repair than normal" due to the high temps, particularly on Shrewsbury to Birmingham (I know - I was travelling that route), the Cambrian, and 197s also appeared to be thin on the ground (which may be the reason that there were 3 x 230s for a couple of days on the Bidstons).
My general observation is that they have generally been more reliable lately, and all 5 of them have been operating (009 had disappeared for several weeks).