A meter has saved me around 200-250 per year, and for the last 6 years, so around £1200 -£1500 just counting it at the prices of 6 years ago. I try to take a more logical view, and never discount doing anything based on the sceptics, and conspiracy theorists. I looked at Smart meters at the same time, saw their limitations and potential advantages of being better informed about my consumption, especially gas consumption, and thought why not. Electricity consumption is easy to track by other means, but gas consumption, when and how much, is not so easy without considerable effort, my major bill in winter is that of heating and gas consumption, but most people only seem to be concerned about electric consumption figures.
..and the same from me, except to those who keep diverting threads to Brexit, and illegal immigrants!