The Shelly-1 16 amp relay switch may meet your requirements, Shelly UK Shop link:
https://shellystore.co.uk/product/shelly-1/Currently priced @ £8.99 + P&P.
The UK shop service is fantastic, first class Royal Mail delivery to N.I. next day, very unusual, I know delivery is a factor of interest to you also due to your location.
Since I deployed my units a later unit, Shelly-Plus-1 @ £11.99 has been introduced, has scripting control capabilities, this would be my choice now at very little additional cost.
I control/monitor my units via a RPi MQTT broker (2.4Ghz Wi-Fi connection) and any op system browser but browser HTTP interrogation/control will also work.
Can also be monitored/controlled by a simple Androis/IOS app..
I choose not to use the Shelly Cloud but this is available, my system is restricted to LAN only.
No 5Ghz Wi-Fi capability.