BG Nexus 900 series smart socket (UK)

This looks like a great deal for a smart double socket. WiFi only, not zigbee or z-wave. Anyone tried connecting it to ST?

Https://www.electricalcounter.co.uk/products/Switches+&+Sockets/White+Plastic/BG+900+Series/Nexus+900+White+Plastic+Double+Switched+Smart+Home+Automation+Socket+13A/911368771