Many thanks for the information Chris.
I can understand the economies of having all the rods and pipes red, having them factory painted various colours would only add to the costs involved.
Apologies to Simon for the thread hijacking, but I have one more Peckett question.
I'm going to be basing my loco on one of the SHT Pecketts, so will need to fit the lamp brackets. The front ones will be black so they're fine, but the rear brackets need to be painted green. Is the GWR green on the model matched to a particular colour?