Rockwool in the floor and wall cavities.
And block up the unused fireplace.
I'll give that a try - fireplace has the potential for noise coming through - it's the 1st port of call really. Thank you.
My brother has a shitload of Rockwool if you're interested.
He very slightly overordered.
@deleted started
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Rockwool in the floor and wall cavities.
And block up the unused fireplace.