Hi guys looking for a bit of assistance if possible. I've got a client who is looking for an Ideal Vogue C40 gen 2 with weather compensation and a Nest gen 3 to be fitted. I've never fitted either of them before so unsure of the wiring. The Nest is not replacing any existing thermostat so I will be running a new link between the Heat Link and the thermostat. If anyone can shed some light on it I would really appreciate it.