Do NOT use BT, there inability to conduct a home move order and successfully complete is astonishing! An active line that gave previous tenants internet and phone at fibre speed seems impossible for BT to takeover? They promised a new line at no cost then cancelled that order too, I’ve been over a month waiting and 8 cancellations. They promise to call you back but not once have I had a callback I have always had to call them. The latest call took over an hour with no change on the order.
I would highly recommend you look elsewhere, the perceived reliability of BT is unfounded and it is not worth your time and effort. Pay more for someone else if you must, just don’t trust them with anything.