Available from - Histoires de roses
https://www.histoires-de-roses.com/rosiers/rosiers-lianes/mannington-mauve-rambler.html

Beales' website says this about this rose -- “A seedling of “The Garland” with large showy clusters of mauve flowers in mid summer. A vigorous rambler with many of the good qualities to be found in its parent. Discovered growing in the grounds of Mannington Hall by Lord Walpole.”

I got it from Ashdown a few months back and potted it up in a five gallon nursery pot. In a few months, it has outgrown it and I'm needing to move it again. Appears to be VERY vigorous, even when just a baby rose. No disease issues so far.