When there used to be a standing charge, there used to be only one single tier or single rate irrespective of how many units of energy you used, when the energy providers took that away, and openly boasted about how they no longer make a standing charge, but they didn't tell the consumers, oh well we found another way around conning you by introducing a two tier terrif system!
Don't need much to work that out, and if you work it out, the higher first terrif works exactly what would have been a standing charge.
As for avereging this cost, over a year, its fine, but one cannot really work this out unless one knows how much energy he is going to use, people who use small amounts of energy will of course pay more for their energy, yet those who use vast amounts will pay less per unit on average. si in the end it did not make any difference, standing charge is still there but kind of hidden in their two tier price structure. they take us for fools like we would not be able to work out why we have to pay a higher first terrif.
I would say, let the energy suppliers come up with an average, single, less complicated terrif that everyone knows how much gas & electricity would cost them irrespective of how many units they use, and so it is up to energy companies to spread any of their admin and infra structure costs built into the terrif, so we the consumers pay just a single rate terrif and don't have to work out the first so many units at x amount and then thereafter at y amount, its all a farce.
Further more, why should people who set up DD, or buy both fuels from a same supplier get any additional discounts, why not keep their prices as low as possible, and same for everyone irrespective how they pay!
We the consumers can just look at each supplier, check what their prices are without haveing the need to go to these websites who offer best energy deals because they can work out who would give yoiu a best deal, why isn't there such sites for pertrol? the answer is we don't need these bloody web sites as they earn their commission through refferal, but we the consumers end up paying for their advice that we did not need in the first place, with a simple single terrif, we can choose ourself who would be best for us, just like you would fill your tank and choose a garage that offers the best price per litre of fuel.