Rebels ‘owe’ David Cameron their support

I bumped into a Tory MP earlier who one might have expected to be rebelling tonight. But he told me he was, reluctantly voting for the AV bill, because “I owe him [David Cameron] this.” His logic was that Cameron had come to the parliamentary party and told them he was going to offer the Lib Dems this so the party was honour-bound to vote it through.