Hi. I'm new to this forum and just looking for some advice if someone could please help. I'm trying to fit a Drayton smart heating system and I'm unsure how to wire one of the components which I believe is known as the programmer or controller. There is one that was originally fitted with the boiler which is located in the cupboard underneath the boiler and is wired directly to the boiler. I need to replace this with the programmer from the smart heating kit. It is the part that receives the wireless signal from each of the TRV's and controls the boiler on or off. In the wiring instructions it explains how to fit the programmer to a single, two or three channel system and I'm not sure which I have. I've attached some pictures to this post and would really appreciate if someone could take a look and tell me which system I have and also which cables are which (if at all possible). There are 2 neutral, 2 live, a grey and a black cable. If someone could identify these for me that would be amazing. Thanks in advance.