That includes rent and council tax. I'm pretty sure it also includes child benefit and tax credits for more than one child, maybe disability benefits too. I worked it out, I used to receive - £600 per month, give or take a few pence. That's with one child an no disabilities. Out of that I had to pay my gas and electric (£120/month - card and key meters, so horribly expensive and I wasn't allowed to change them), phone contract (£30/month and needed), internet/tv package (£60/month ish, I don't remember exact figure, but needed), tv licence (£12.50/month, so I could watch the tv I'm paying for), and the rest was sucked up by groceries, bus fares etc.
Now, I know I've not even accounted for half the figure I quoted, but factor in that the money came in weekly or fortnightly, which made it difficult to budget. And a month is not exactly 4 weeks, so I had to time my shopping around the bills. Throw in late charges when it inevitably goes wrong because an automated payment won't go in on a bank holiday, the expense of baby formula and nappies (I wanted to bf but unfortunately couldn't), a little something for emergencies...it's very easy to end up broke. And I'm lucky too, I don't have a car to run or debts to repay.
And of course, if you miss one meeting - even, say, if your child was in hospital - they sanction you. You have to jump through a thousand hoops for the most basic standard of living. And it's soul destroying.