Gordon Brown is facing a Labour revolt over plans to cut the benefits of the poorest families by up to £15 a week, The Times can reveal. Proposals to be implemented next April, a month before a general election, could mean some people losing a fifth of their income. The move, which has provoked anger among Labour backbenchers, was compared last night with the fiasco over the abolition of the 10p rate of income tax. At the moment 300,000 people on low incomes are allowed to keep up to £780 a year of their housing allowance if they find accommodation...