The wood beds are made of 4 courses of new oak railway sleepers. I think these are 250x150mm and they come in standard lengths, often around 1.8m or 2.4m, so are cut down to fit. Beds around 600mm high are good to perch on.
Thank you so much for taking time to answer my question. Much appreciated!
Its made by Uber. Harrods and Notonthehighstreet have it on their websites, and there are various other sellers around. The one in my photo has a nylon garden chess board made of 64 mesh pieces that slot together, but some sell it with a plastic mat (like a plastic tablecloth) - which could be less stable on a windy day - so check before you buy!
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