I was gonna make my own Loads for these wagons like I have with many others, but like Gary says, it is question of time etc. I have heard good reports for the current Hornby Wagon range of Wagon Loads.
As you said Gary, these wagons are not new, in fact I couldn't even tell you when they were taken out the Hornby range. I only have catalogues going back to 1999, and they aren't in it so I couldn't even guess.
They are all labelled R217 B.R. Mineral Wagon. Undeneath the Wagons themselves, it is stencilled on with R009*020.
2 differ in that they are labelled R243 BR Mineral Wagon (an earlier incarnation?), and they appear to be in an earlier box style, which is given away by the older Hornby Railways logo on the box of the type where you cant see the contents without opening it. Comments welcome.
My kids have some Hornby Plank Wagons, so buying a small number of the Wagon Loads to try, even if they don't fit, wouldn't be a complete loss.