Undulata - I think we all have a few of the really old varieties. This one was moved and divided last autumn.
and Undulata Albomarginata - I have several which are mired into the roots of my Linden tree. They are there for the duration.
Venus - this one has spectacular double white fragrant flowers later in the season.
Warwick Curtsey - fast growing. I took several divisions from this one and you'd never know it.
Whirlwind - I've had this for many years but it has grown slowly. I lifted it last autumn and took a few divisions and moved it to a brighter, moister spot. I'm hoping for better growth. I also kept one division to try elsewhere in the yard.
White Christmas doing well this year. Last year it was decimated by earwigs.
Wylde Green Cream
X-Rated - another which I fully divided, sold off some sections and replanted the rest in 3 groups.