Viburnum plicatum

I don’t think so. ‘Plicatum’ refers to the pleated leaves which the shrub in the picture doesn’t have. I’m no Hydrangea expert but that’s what this looks like to me. Something along the lines of H paniculata ‘Phantom’ perhaps.

Thanks all. Thought hydrangea but the flower head looks to small.

The viburnum also blooms much earlier in the season.

There is a big range of flower sizes with hydrangeas, of any kind. So it is hard to say precisely which one this may be. Smooth hydrangea (H. arborescens) can also produce flowers similar to the above with unnamed forms.