Strange Statistics

I was reading this article with a great deal of interest. I'm a firm believer that technology and, in particular, the internet should be accessible to all, and that the socially disadvantaged should recieve assistance to maintain a basic home PC with internet access. I am sure that my children would be at a distinct disadvantage in today's society if they grew up to be computer-illiterate. It's a shame that that's the case but, let's face it, it's a major part of life nowadays and will become more so as the future unfolds.

"A study published by the GLA in November 2003 found that nearly 90 percent of London families with children and an annual household income of £52,000 or more have the Internet at home, compared to just 20 percent of married couples with an income of below £10,444. "

So I was reading along, empathising with the need for action. Then, I actually realised what the figures said and, to be honest, I found them a little incredulous. The article claims that only 20% of married couples earning less than £10,444 have internet access. The figures were established from a GLA study which were published in November 2003. That's a joint income of less than £200.85 per week? Who are these people? There can't be that many of them, especially in London. Unless I'm sadly disillusioned, and please bring it to my attention if I am, social security payments alone for a married couple would exceed this.

Where do these statistics come from and how are they compiled?