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You'll probably be better of with a third party hub, there's plenty of them that can do what you want and are 'affordable' (depending on how much you're willing to spend)
As @Anonymous has said, you's be better off with a third party VDSL router. The TD-W9970 is a popular choice around £30-£40 mark. (£33 on Amazon)
If you go to the plusnet community site, There is a poster Baldrick1 who uses a BT Business Smart Hub on plusnet broadband. As a residential user.
As they are part of BT the hub works with plusnet but not with ee the other company which is part of BT. Neither do ee hubs work with plusnet or BT.
On the thread I show, it may assist you. Although it is BT Home Hub 6, read the posts as some will talk about the Business Hub and the difference
The BT Business Smart hub is packaged as such and is different to the Residential Smart Hubs and are availabke on Auction sites
I have no problems with it, I use the BT Smart Hub2 however it depends what you want and what demands you require from your modem/router. When I was with plusnet used BT Smart Hubs with no problem, found them better than the Re branded BT Home Hub 5 which plusnet offered. They also look smarter if you are unable to hide them.
Thought the BT hub is ok?
If all you want to do is access the internet with no frills, then in my experience they are, but if you want more flexibility (i.e. determine your own DSN server address) then 0/10.
That's just my opinion of course and I know there are many experienced & knowledgeable users on this forum who consider £30 - £40 3rd party routers to be an improvement over those that BT value at £200
Know your BT Hubs
I would not touch a BT Business hub 5
However the Business Smart Hub is a different kettle of fish.