A Thames Clipper catamaran passing the Houses of Parliament in London, UK, earlier this month. The river bus service added two new high-speed catamarans to its fleet in 2015 and the river transport network has also installed pay-as-you-go Oyster readers on all piers served by the Clippers. A River Action Plan launched in 2013 aims to increase Thames passenger journeys to 12-million by the year 2020.