smart control

Hi All, I'm after some advice/guidance, I'm in the process of renovating an old house I would like to add automation and "smart" control to some elements the principle one being lights. I've found a range of products that I would like to use that are DIN rail mounted they accept switch inputs...

We have a combi boiler running a single zone system over three floors. All rads have TRV's apart from the middle floor bathroom. I would like to upgrade and provide better control over our heating and try to reduce our running costs. I started to read up on the Honeywell Evohome smart system...