And also, I wouldn't go without these days. I'll probably add the individual radiator TRV's at some point as when WFH we are upstairs all day, downstairs in the evening so would be good to be able to manage the temps zonally.
I got one cheap as I already had the hub from a previous house. You just have to add the reciever to the boiler and pair it up. I DIY'd having looked at a few wiring pictures online, and I'm no expert. It's easy enough BUT I suspect there are many variations on wiring setups so don't necessarily...