Rodders53, its the 1st gen: https://www.screwfix.com/p/drayton-wiser-wireless-heating-hot-water-2-channel-thermostat-control-kit-white/9575v#product_additional_details_container
Hi,
I have a convectional British Gas 300+ S-Plan system with two 2-port zone valves, currently controlled by a Siemens RWB9.
I plan to replace the controller with a DRAYTON WISER WIRELESS HEATING & HOT WATER 2-CHANNEL THERMOSTAT CONTROL KIT.
I have attached a pic of the old wiring backplate...