Could you tell me what plant this is please? This is the leaf, it flowers in late July/early August.

this is the first time I have had the nerve to answer a question instead of ask one, so be gentle with me! Looks a bit lilac-ish, but what time of year does it flower, it is stunning.

I see what you mean junie, we maybe need to see a leaf as well, I was in a local garden centre today and they had an unusual hydrangea for sale( very expensive) with similar shaped flowers almost with a greenish tinge-- i'll look it up and see

Could be either, as Pamg says a close up would be nice.
Very well kept lawn may i say and edge!

hydrangea paniculata 'limelight' altho a picture came up from t&m of 'vanilla fraise' stunning and not that expensive!

p.s. i'm not saying thats what it is---just maybe---

When does it flower? Deciduous or evergreen? And a close up of leaves, as asked for above, would be good.

I thought it looked a bit like a a hydrangea paniculata too - again, I'm no expert.

It is the single stemedness which makes me doubt that it is one of the Hydrangea paniculata types, they usually have multiple stems, unless very carefully trained to be a standard and looked after to keep them that way.
There is one called Pinky-Winky, awful name, but a lovely colour.

It could be Hydrangea quercifolia. If the leaves are Oak shaped then that what it is. Google it and look at the images it looks very similar