I have an old Ideal Mexico boiler and was wondering if there were any smart thermostats we could use with it. We did get a Nest (I think) a few years ago, but had to send it back as when the elextrician came to fit it he said we had the incorrect wiring behind the timer. I've attached photos of the setup we have. I'm looking into Smart thermostats again as I'm now working from home some days and in the office others and would like to be able to program the timer to come on at different times each day. Our current basic one will only let us programme the same times each day.