Thanks Stem. It did have and it all works fine now thank you. My point about the tech support is that they ONLY support the software and have no interest in helping with wiring. They could only suggest sending an engineer round at a cost of £100! I appreciate that some wiring can be shoddy, but...
I've had the exact same issue today, and the Hive customer support are useless as they can't support wiring! So, Lee42534; did stem's solution work for you?