How do you get 129kWh? If that's from the m3 readings on the smartmeter, the problem is we're hoping that's wrong, so you're being billed too much. It's still something like 2x typical usage, after all the tweaks listed in #115 (specially the electric fire in the study!), which I would guess make the house less comfortable than you'd like. Unless your place is very untypical in terms of losses, insulation etc.my gas usage has gone down from an average of 225 kWh for 01-20 Jan to just 129 kWh for 21 Jan (yesterday).
I don't believe TADO, Nest, smart TRVs etc will give more than a marginal improvement in gas consumption, and take a long time to pay for themselves, if ever.

