Thanks - I have these wagons which were for dropping ballast in permanent way maintenance trains, rather than point to point haul.
The ICI hoppers were also a good bit bigger, weighing 70t full as opposed to the 40t YGH. They were the biggest hoppers in regular use for a very longtime - they made quite an impression as they passed by creaking and groaning.
Thanks Angela - I'll have another look through these gents stuff - I think it is mostly 4 wheel wagons tho'.
regards
Stovepipe