ACL thermostat replacement

The Honeywell DT90E Wired Digital Room Thermostat leads the way in energy efficient control by using advanced technology to maximise the energy efficiency of the heating system. The Honeywell DT90E Wired Digital Room Thermostat has been designed to provide automatic temperature control of gas or oil fired boiler systems, underfloor heating, electric heating and zoning systems . Mains or low voltage switching , two wire connection .

I agree with Arusu Electrical, Mike

I would replace your old thermostat with a Google Nest E. The Google Nest Thermostat E comes with proven energy-saving features and has a simple schedule that’s easy to adjust/set. You can control it from anywhere either from the display or with the Nest app. It has many proven energy-saving features and can help you save energy from day one. The home/Away assist feature turns itself down after you’ve left your home, so you don’t heat an empty home. I hope that is helpful.

If you are looking for a standard room thermostat then Salus have a good range of wired and wireless ones. I have fitted about 50 Honeywell CM927 wireless ones over a 3 year period. However they can be expensive and prone to signal and display problems.