hmm, you could be right, I'm not clear on the details, I was taking this from a presentation I'd watched last night by the head of OFgem where I'm sure he said 'WE are investing £20 billion in upgrading the national grid before 2020'.
As he works for Ofgem, I was assuming the we referred to funds Ofgem directly manages, but it looks like it's more like they regulate the charges the National Grid is allowed to make in respect to grid upgrades etc so effectively authorised the spending rather than actually funding it.
Yes, the "WE" actually means that OFGEM have declared that National Grid must invest a certain amount of money into the grid, for specific purposes, over the next several years.
National Grid have to find that money up-front. They are then allowed to earn about 10% return on that investment.
However, a very large amount of that investment will have to be borrowed - if they can - otherwise shareholders will have to cough up a lot more. If the money has to be borrowed, they will have to pay 5-6% interest on that. The remaining 4-5% will be their profit margin after interest costs.
Or, with the entire of National Grid "worth" about £25bn, for a literal doubling in the size of the company (assuming £25bn additional investment) they can ask the shareholders to "double-up" and pay an amount into the company equal to the current holding. So if I held £10k worth of National Grid shares and they could not borrow the money needed, I'd be looking at having to fork-out another ten grand to fund this expansion - and with the additional risks that the government or regulatory environment may change and end up losing that money if the government "did a railtrack" and seized the company.
As I've said a few times: if investment is required, there must be a reasonable rate of return allowed (what's the current ROI for solar?) and there must be a reasonably predictable outlook for the risk:reward.
Most of the UK's nuclear projects have been scrapped because the government has been dithering with publising a clear set of rules, expectations or allowed rates of return on investment.