Highlander

That definitely makes sense, and assuages fears about reg compliance too

Thanks - I'd looked at the Shelly gear, but haven't seen enough reports about UK regs or quality - will look further [Update: just checked and remembered why I'd ignored Shelly - can't see anything in their product list with >16A capacity]

My now elderly ground source heat pump has no time-of-day controls, so I want to replace its breaker in our consumer unit with a wifi-controlled breaker, so that I can control times of operation to match a variable tariff. There are plenty at 63A advertised on Amazon & eBay, but I've not been able to confirm which (if any) meet UK regulations. Can anyone point me in the right direction here? thanks…