I’m an electrician and I run EcoGuides.co.uk, here are the genuinely useful quick wins that you can try today.

\\-Set your heating schedule around occupied hours (not “all day just in case”)

\\-boiler flow temp: don’t run it hotter than needed (big gas saver)

\\-TRVs: stop heating unused rooms

\\-Dehumidifier vs constant window cracking (depends on the issue)

\\-Standby drains: measure 3 worst culprits first

\\-Laundry & dishwash: shift to off-peak if you can

\\-Drafts: fix the obvious gaps before turning the stat up

If people want, I can share a simple 1-page checklist I made for customers. If links aren’t allowed here, I can DM it.