Canberra, There are, IMO, loads of reasons why not.
Just some for starters......
Where to put them
Where does the equipment come from
Ditto staff.
There is (was?) a grand plan to put Manch into Swanwick, no, NSC, or was it Swanwick again?
This would result in savings from commonality of equipment, staff in one less location, no rent to pay for Ops room.....
I'm sure that someone with more knowledge than I will add...