I believe it is a "working name" of a rose found at the NSW Brownlow Hill property. The earliest reference I was able to find on it was 1980. Thank you Jay-Jay for your valuable comment. My 'Paul Noel' also has a later repeat and today it has two flowers left, but high in a tree. They seem to be a one-colour all-over pink compared with the potted rose's whitish outer petals. 'Paul Noel', for me, has long thin canes that fall vertically out of its tree. It is too early for me to say whether "Brownlow Hill" will do the same. I can't really see any of the beetroot stain on the reverse side of the petals that Esmond Jones talked about in the 2003 reference (and which I have certainly seen here on "Brownlow Hill Rambler" ) in any of the 'Paul Noel' photos.
I think too that 'Paul Noel' has more of a star-burst of petals than "Brownlow Hill Rambler". However, I have added a note on the main page to compare the foundling to 'Paul Noel'. Grateful for your thoughts.