Paddy, tyhis platform is part-commercial part scratch built. I used the Peco stone faced platform edging strips (LK -62), faced with Wills course stone SSMP200 (cut into 15mm strips) and glued direct to the Peco platform edging. When I am happy with the clearances and shape of the edging I stuck it down with UHU glue. When dry, I decked it with Will Victorian paving SSMP221, carefully scribed to fit. It works! Don't forget to throw away those awful printed stone stickers that come with the Peco platform edging.