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a cute white campylogynum, you could call it R. camp. leucanthum.....
Could the bluey/purple one be an impeditum hybrid, such as Blue Tit or Sapphire (which is Blue Tit backcrossed with impeditum). The only thing is, it seems too late in the season, mine of these varieties are in flower in April.
The pinky flatter flowered campy might be a 'Patricia'....it's hard to tell colour from a photo but I don't think it's 'Plum Branklyn'I don't think it's one of those, Diane... too late for them and also the flower form... those tend not to have such neat little pompom heads.
Not flat but flatter than staight campylogynum... so I think Patricia is still in the frame for this ID. I still incline to 'Intrifast' for the purpley one, the earlier flowering suits that, too. It shows the influnce of fastigiatum in colour, foliage and flower head. It might be 'Blue Diamond', rather than 'Blue Tit', but I think the colour of Graham's is more intense.
The small size over that period of growth does suggest either Intrifast or even straight fastigiatum... which I have a nice shiny leaved form of, quite like Graham's. I thought by the initial photo that the plant might be rather larger than it really is.