Thanks again. I realised what you meant as soon as I hit post.
One advantage of living in a modern open plan shoebox is that the timer controls are in the living room/dining room area so that's not a problem.
On a related note I have traced back the mains supply to the timer and isolated...
Hi,
We have no room thermostat in our house only thermostatic rad valves which is costing us a fortune. I thought I could therefore replace our Drayton timer (Badged as a British Gas UT1) with the Honeywell Homexpert THR870CUK. The Drayton runs the heating on a Baxi combi boiler. However the...