Apart from a RADIUS issue that Zen needed to correct, yes thanks.
I kept getting directed to the BT Wholesale page about the ISP not accepting the connection.
I rebooted my router a couple of times, checked I'd put in the username and password correctly and set it to PPPoE.
I then switched over to the router they had sent me, rang them and went through configuring it except I'd put rhe ethernet cable in the wrong port so said I'd ring back (I have the router, a MyCloud and Hive Zigbee hub connected to the router) and I need to sort out the cabling in the desk cupboard where it lives as some of the cabling is too long.
Anyway I connected it and the router returned the message it couldn't log in so called back, they found the problem and sorted it.
The Fritzbox takes a lot of space so I've just switched back to my Netgear D6400 which connected right away this time.
It;s very nice to have the sort of speed I have at work at home now.
Virgin (ADSL) => Namesco => Newnet => O2 => Plusnet => Zen => Newnet => Zen => Freeola => Vivaciti (using O2 Wholesale DSL) => Xilo (C&W Wholesale) => Xilo (O2 Wholesale) => Xilo (TT Wholesale due to O2 Wholesale closure) => Zen LLU => Awaiting Zen FTTP
Router: Netgear D6400
Note: I don't lay turf for anyone. astro or otherwise, all views and opinions expressed are my own based on experience.