Recommended replacement for BT Smart Hub?

Hey guys, I'm UK-based and looking to replace my basic BT smart hub router. Essentially I want to be able to create additional wifi (ie. a separate guest wifi) and also want to broadcast both 2.4 an 5ghz bands.

My budget is £100/120, so nothing too fancy, even cause with a 54mbps line and only 2 people living in the house I wouldn't need it.

Any recommendations? :)