One national (likely state owned) provider? One set of products, with gigabit download and 100 Mbps upload? Thats what you get from the one network provider that thinks they are state owned.
This what think going to happen:-
BT (Business) is going to start sell
symmetrical version of fibre internet (1Gb Download/1Gb Upload)
EE (Consumer) is going to keep on sell
asymmetrical version of fibre internet (1Gb Download/100Mb Upload)
They also make out some SLA which rather pointless because fibre dosn't have much down time. So for SLA and being symmetrical charge an extra 50% more for something which dosn't cost anything near that much more.
SLA uselessly pointless because 99% of the time they are covered under a
best effort, which is SLA form of get of jail free card. They always have wiggle out if want to, all they have to say is "It was there
best effort".