Light Switches - where to start? (UK)

I use the smartenIt 3 toggle zigbee battery-powered switch with SmartThings. It works well for me in the US. Unfortunately, I don’t believe they have a UK distributor. The company is very responsive if one writes to them, so I would ask and see. It’s very intuitive for guests and visitors, which is a plus. (The following clickable link includes photos.)

It’s definitely frustrating that there aren’t more devices already available. All I can say is that this particular one does work for me.