Indeed, Dive.....now that you mention it. Models to date have all sold out, and standards increase all the time, thanks in part to Messrs Glenderg, Garfield & Co.
A high quality RTR laminate, tin heating and luggage van, and Park Royal would cover the mid 1950s to mid 1980s, an era with much interest. Available in weathered unpainted silver, green, and black'n'tan would cover everything; indeed, revolutionise passenger trains on layouts. More RTR wagons are needed from the 1940-1980 period, as many many superbly excellent layouts still rely on British Rail goods stock among good quality CIE / GNR / UTA locos and passenger stock.