The rose I have as "Port Arthur" can't be Lady Waterlow if the plant as Mottisfont is correct. I photographed that plant at Mottisfont 18 May 2023; it is stunning and I dearly wish I did have it. If the original found plant was really LW then it must have been switched at some stage in the chain by which it came to me. My plant came from John Nieuwesteeg with budwood, I believe, sourced from the HRIA collection at Ruston's.