Self sown shrub id please

Definitely didn’t plant this.
Also got another popping up in another spot nearby.
About three and a half foot tall. Large heads of of creamy white florets. Not much in way of leaves yet.
Slightly fragrant.

No idea what it is but I would say it was a 'keeper'!

Maybe a Viburnum of some sort?

Looks like a viburnum to me... maybe burkwoodii? I have tinus that is in flower now, though that is fully evergreen, and another that flowers without its leaves, but that is just gone over.

Yep ... looks like viburnum burkwoodii. Thank you.
Shall have to carefully excavate the smaller one that is tangled up in brambles and move it to more hospitable quarters.
Wonder where they both came from.