Thanks for your replies.
My room is is part of an open plan living room/dining room/kitchen area.
The living room is 3.5 x 5.5m, but one side of the 3.5 is open to the dining which is about 3.5 square, with the kitchen behind that in an L shape, all with pretty high ceilings.
Can't stretch to the fyne vintage, but the vintage classic 12 and devore 0/96 are a similar price that i can just about afford.
It's not a dedicated listening room, so I think I'd do better for family harmony with two larger speakers, rather than 2 speakers and 2 subs. Do you use high pass filters for your tannoys or just tune the low pass so the subs only take over as the tannoys roll off?