MOST commuters have at some point shut their eyes and nodded off on the journey to work. But tired travellers beware - your prostrate body and slack-jawed dribbling is visible to the world. And now one passenger has starting collating photos of the funniest sleepers public transport can offer. Twitter feed Sleepy Commuters publishes pictures of knackered workers snoring their way through journeys on trains, buses and Tubes.             –DM