The Plusnet hub one router is a BT homehub 5a internally, it do not have Bt fon/Wi-fi and it don't have smart setup, which is not a bad thing,
The hub is produced by Sagem.
My mate got one and it is ok, certainly better Wi-fi than his old Speedtouch. Tiny is not a word I would use, in fact the shape of it is strange, just like the BT homehub.,
I hope your internal wiring is good as VDSL is a bit more sensitive than ADSL.
Desktop machine now powered by windows 8 pro 64bit, no dreaded metro and Linux , laptop by Linux