Pictured: The car was completely submerged by sea water. An unlucky driver left their sports car parked by the sea only for it to roll down a slipway and end up submerged by the tide. Dog walkers and passersby noticed the flashy BMW stuck in the mud early this morning. The silver convertible 3 series - complete with sporty bucket seats and worth approximately L7,000 - was later covered by seawater in Southampton Water, Hants. SEE OUR COPY FOR DETAILS. ? Simon Czapp/Solent News & Photo Agency UK +44 (0) 2380 458800