they have potential...
brsk have been advertising and leafletting in my area for a few years. when they first came on the scene their "fibre" offering was actually fibre to a wifi access point up a telegraph pole, with external antenna installed at your house. yeah, no thanks.
but to their credit they have been rolling out actual fibre - their own network, they're not piggybacking on openreach
they have had actual FTTP in my area for a good few months now, and seem to be making a sales push -- had a door-to-door brsk salesman knock on only last week
symmetric 2 Gbsp FTTP was certainly tempting... but i'm happy with my aanet connection, so thanks but no thanks :)