Mark, to be honest I am quite happy to say that is S. squamosus based on form, given the specimens of each that I have seen in the flesh, and in books etc. S. squamosus can form dinner plate sized fruiting bodies, and although I have seen many specimens of S. scabrosus, they were nowhere near that size, and never that colour, always pinkish to chestnut red. Yours look big, and the colour and shape match S. squamosus. And you checked the characteristics given by Andreas which are probably a better test.
By the way, the hyphae of S. squamosus have clamp connections, as you will see when you get your microscope!