I am hoping to replace the BT Smart Hub ('Home Hub 6') with a drop-in replacement.
I want to take the BT router completely out of the equation.
What should I be looking for when shopping? Just that the router includes a modem?
Assuming you have VDSL, a wireless router would be no good, you need a combined modem/router like this.
https://www.tp-link.com/uk/home-networking/dsl-modem-router/archer-vr400/v3/
Emulator https://emulator.tp-link.com/vr400v3_emulator/index.htm