That's my idea of a goods train. So I could buy one or two and sandwich them between other loose coupled wagons and the essential brake van behind a black and tan 141 or C class B&T livery.
Absolutely. I used to see the Belfast goods a lot in the 1960-75 period. Mostly "H" vans, but you'd get the odd flat, then the "Lancashire flats" with Guinness kegs started appearing - again, mixed in with a train of other stuff; same with the bubbles.
In those days, vans were a mixture. Most were "H", but many a GSR inside framed one, old wooden GSR or GNR types, palvans.... and even the odd cattle truck.
Modelling before 1970 is inevitably grey for everything, with brown appearing about 1969/70 and by the time the loose coupled stuff had disappeared in the mid 70s, brown represents maybe 65% of the wagons.