Looks like it's going to be a Non-issue now anyway as Pulse8 were actually rather accommodating and arranged the cease for a few days before the new one goes live so it should be a "spare" pair by the point the engineer comes to install.

If It wasn't that I wanted to go with AAISP for Ipv6 and a couple other things (Didn't go with them initially because until the new 1TB packages came out they'd have been to expensive) I'd have happily stayed with Pulse8. Certainly happy to recommend them.