In respects to Smart Metering the only advice i would give people is to make sure their supplier are installing the right kit. The Smart metering mandate which means that all UK homes can have a Smart meter by 2020 states that the meters have to be a certain specification called SMETS 2. Some suppliers, (especially British Gas) tried to jump the gun a few years ago by installing meters that they believed would fit the SMETS 2 standard (which had yet to be agreed). It turned out that they got it wrong and a great deal of what they installed were classified as SMETS 1 metering. If you have a SMETS 1 classification meter it will need to be swapped out before 2020 to a meter that is of a SMETS 2 specification.....
We had them installed after being badgered by British Gas as few years ago. Neither of them worked and they replaced both of them. Then a further 2 teams were sent out one after the other to replace the still faulty ones. Each time they never stayed long enough to see it it would actually start working, they just kept lying and reckoning "it takes a couple of hours to kick in...." At first they reckoned it was because their Vodafone signal wasn't getting through, then we got a letter a few months after saying that the meters they had installed were out-dated ones and we would need to eventually have relacements installed 'in a few years time when the program is being rolled out'. The electricity one only started working last year, and the gas one has never worked.
I just keep reading the meters each week myself to check on how much we are using and the cost so far that quarter.
We also received the letter about ringing them to stay on half hourly readings, but it's gone in the bin because it doesn't make any difference to us. We can see what we are using by reading the meters ourselves.