 a British cyclist who smashed the round-the-world cycling record three years ago is aiming to set a new first - this time on the water.  Mark Beaumont will be part of a crew of six rowers hoping to complete an atlantic crossing in less than 30 days - a feat which has been described as the four-minute mile of ocean rowing.  Departing from Trafaya in Morocco as early as Monday, the team will row for two hours on and two hours off, around the clock, in a bid to shave at least three days off the current record.  The gruelling shift pattern means that non 