OPINION - We all know why Britain's benefit numbers keep rising: too many mental health claims

There are some figures that are so strikingly off the scale – the cost of HS2, say, or levels of immigration – that you think there must be a nought too much or a decimal point missing. But no, the digits are correct: the number of people claiming disability benefits in Britain will increase by 750,000 – that’s three quarters of a million – over the next five years.