Could someone help me identify this shrub please?

Yes that's what it looks like.
This is what Franc said about it.
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Limelight hydrangea

There are both bush and ornamental tree varieties
 
Pretty blossoms! I have a white hydrangea in my front yard, too, but the blossoms on my variety are more conical-shaped.

They are starting to turn pink now as they dry out.

Lee
 
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