Bachmann 4-BEPs with 45% off at TMC (now £274.99):
https://www.themodelcentre.com/31-491-Bachmann-oo-gauge-class-410-4-bep-4-car-emu-7010-br-blue-grey
https://www.themodelcentre.com/31-490
Finally made my way to Trains4u today and got myself a couple of the medium weathered HAAs, one with tyre marks, one without. Great wagons and great weathering. Only wanted two for a Speedlink Coal Network train.
£87 for a Heljan 33 211 in RfD livery, seems in good working condition:
https://www.hattons.co.uk/1517646/heljan_3330_po01_class_33_2_diesel_33211_in_railfreight_distribution_sector_livery_pre_owned_fr/stockdetail
Don't know if they've been seen before but Rails have painted samples of their 31413 Severn Valley Railway:
https://railsofsheffield.com/blogs/news/exclusive-class-31
I see on these pages you have also listed medium-weathered HAA wagons. Are these the second batch of weathered HAAs, with lighter weathering? Have you got any pictures of the finished wagon please as none appear on your website page?
Useful to know that extra weight seems to overcome the running problems. I was happy with how it looks, especially the recent Metro-Train one, but put off by the reported poor running.
Just popped up on my news feed:
Hornby Visitor Centre, 15th and 16th July, sale of ex-display items and damaged box items at up to 30% off (presumably RRP, but not sure).
Includes Hornby, Scalextric, Airfix, Corgi and Humbrol.
Rails selling Heljan O gauge Catfish and Dogfish wagons for £79.95 and £89.95:
https://railsofsheffield.com/collections/Heljan-o-gauge-catfish-dogfish-ballast-hoppers