37427 was inside D1015 Bescot-Newport on the Western Trident tour on Saturday. Apparently, it then worked light to Westbruy to work pways, which fits in with what I saw because D1015+37427 ran light Newport-East Usk for fuel/coolant and 37427 didn't return, but when I latyer passed East Usk with the wizzo it wasn't there so it must have worked east. It was interesting thrash because of the unusual conbination, but was still loud!
Someone on the tour on Sunday said that 37408 had had its nose cut off, but damage did not appear too severe from a distance on Saturday. I wouldn't have thought that EWS would bother spending money on a loco with so little time left in service.
HST Fan, a good idea for charter trains is to get hold of the charter companies booklets with listings of charters, itineries, motive power, etc. Alternatively, you could look at charter company websites. That way you are unlikely to miss a charter even if it doesn't get posted.