The inquiry set up after the collision in 1989 between the "Marchioness" and the dredger "Bowbelle", that resulted in the loss of 51 lives, recommended a dedicated search and rescue presence on the Thames. As a part of this, the government approached the RNLI, who agreed to provide a rescue service that covered the tidal Thames between Teddington and the Channel. Locations were approved for stations at Teddington, Chiswick, Tower and Gravesend. These all became operational at the beginning of 2002.