Diamond at Redditch have a V reg Trident President that occasionally does the Matchborough circulars 57 58 though is usually on school route 301. It’s not DDA though
Reading Buses have 4 x reg East Lancs Tridents, formerly with Blackpool Transport. They see regular service but will be replaced when the new Metrodeckers for the 702 arrive
National Express West Midlands as mentioned have 5 Y reg ALX Tridents, though the 4 at Birmingham Central depot shouldn’t last too much longer. Otherwise, there are a rather large fleet of 51, 02, 52, 53, 04 and 54 plate Tridents numbered 4310-4634 (some of these numbers are withdrawn, and the fleet of Gemini’s are in between these too). More Platinums on the way will make inroads to the 90 odd survivors in the 4305-4414 range.
This amount is significant when you look at how many Stagecoach Tridents there are of that range still in normal service.
Hedingham & Chambers used to have a large fleet of V and W reg Volvo Presidents, ex London. I’m not sure if there’s many around still after some 59 plate Scanias transferred there