I've eventually emailed Netomnia instead (obviously the parent company to youfibre), so have it from the horses mouth so to speak. The build has been paused, (the excuse) struggling to get contractors to do the work etc etc.
So I've decided to bite the bullet, given my 30 days notice to VM and signed up to
talktalk unfortunately, probably the best of a bad bunch around my way I'd say. Just on the off chance youfibre do get their stuff together within the 18 months contract with talktalk, hoping they still offer a contract buyout so could go over to them rather than sit it out. Can live in hope.