VMO2 and CityFibre are reportedly holding merger talks, which would bring together by far the two largest fibre builders competing with Openreach.
On a conventional altnet acquisition assessment, CityFibre is an attractive target given its scale, but a very expensive one at a full price given the degree of overlap.
The acquisition might still be attractive given the opportunity to take out a wholesale competitor but, for this same reason, regulatory clearance would be very tough.