The power generation company Drax, based in North Yorkshire, has been hit with a £28m financial penalty after failing to meet targets to provide energy efficiency measures to homes. It's the largest penalty ever handed down by the energy regulator Ofgem.

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Ms Burge tells Wake Up to Money that over the last couple of years retailers and consumers have "engaged in a game of chicken". Consumers have started holding out on retailers, she says, in the knowledge that the closer they get to Christmas, the more likely they will be to get a deal as retailers start discounting.

More from Andrew Miller on tech firms' terms and conditions. "They are often laughably long and written in the kind of legalese you need a law degree from the USA to understand," says the Labour MP for Ellesmere Port and Neston.

NASA

Image source, NASA

If you don't really get all this Black Friday stuff, it's not really your bag or the fact that the spirit of Christmas has been lost in worship to Mammon is getting you down, NASA has a solution for you. It tweets:, external "It's #BlackFriday, but for us, it's the 2nd annual #BlackHoleFriday. Today, we'll post pics & info about black holes".

The chairman of the Science and Technology Committee, Andrew Miller, told the BBC: "I simply cannot say to a constituent of mine I know with 100% certainty what they're doing with that data because frankly I don't understand those legal terms and conditions".

MPs are calling for social networking companies, such as Facebook and Twitter, to explain more clearly to users what they do with information collected about them. The Commons Science Committee says the firms' terms and conditions agreements are far too long and complex for any reasonable person to read.

Alistair Charlton, senior technology reporter at IBTimes UK

Image source, Twitter

tweets:, external "Tesco website down, Currys website down, shopping chaos caught on video, external. It's #BlackFriday."

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Natalie Burge, retail analyst at Planet Retail, says Black Friday is a "really strange phenomenon, but it makes sense in the US" because it comes after a public holiday - a bit like Boxing Day. Whereas in the UK it's just another day. Black Friday falls on "the day of the last pay cheque before Christmas" so retailers are spotting an opportunity to get consumers to part with their hard earned cash, she adds.

Shareholders among you may still recoil at the term "Black Friday" - the name given to the stock market crash of October 13, 1989. But fear not, in the shopping context, the name has no such negative connotations. It's called Black Friday because many shops make enough money to put them "in the black" for the year, apparently.

Image source, PA

Police were called to a number of supermarkets across the UK last night, amid concern about the size of crowds waiting for the doors to open on what's become one of the busiest shopping days of the year. Increasing numbers of British retailers are adopting the American tradition of reducing some of their prices for Black Friday - the day after Thanksgiving. Some websites are already reported to be struggling to cope with demand.

Matthew West, Business Reporter

As always, you can get in touch by emailing bizlivepage@bbc.co.uk or tweeting @BBCBusiness., external

Joe Miller
Business Reporter

Good morning. In a long-awaited speech later, David Cameron will call for major changes to the benefits that can be claimed by European Union migrants. He'll say they should have to wait four years before they can claim in-work benefits such as tax credits, or be eligible for social housing. We'll bring you more on that, and the rest of the business news throughout the morning.