LONDON, Apr 4: Bogged down by a stagnating economy and sinking poll ratings, British Prime Minister David Cameron ventured into a new swamp when he waded waist-deep into mud to rescue a drowning sheep. Cameron was on his way back from visiting a farmer near his weekend home in the Oxfordshire countryside last month when he heard bleating and spotted a ewe that had got stuck in the mud after following her two lambs. (agencies)