Thanks, Paul, but no, they don't really show anything.
Ray, I don't know why they would have decided on bare decks. They were plywood, so were painted…Cerrux BS 861 Light deck grey Anti-slip. (I might have got the number wrong). It's on the Vospers drawing that mentions colours. Similarly white is crossed out and grey replaces it, but I tried that and it makes the boat look altogether too grey and naval, which I just can't take personally, so I have painted the roofs white after all, although I could be persuaded that the roofs and decks were the same colour and the sides were lighter, being Cerrux light grey "Smooth". But in the end, I think such a pretty boat deserves to be prettily finished, so for now, white it is, but yes, decks were definitely painted and with non slip too. You can see the inevitable congregated filth in the texture on the 2 good pictures.
Ensign hallyard, it seems was effectively a loop, which answers that question.
Cheers,
Martin