The following details were found here.
Built in 1932 by Groves & Gutteridge of Cowes, Isle of Wight, DOWAGER is a lifeboat who was launched with the name ROSA WOOD & PHYLLIS LUNN. Her hull is of mahogany on oak frames and her engines were twin 72 hp Parsons Porbeagle diesels. She became Shoreham’s fifth lifeboat and served for 30 years during which time she was launched 244 times and saved 143 lives; she then spent another ten years on the reserve fleet of the RNLI. During World War II she took part in the Dunkirk evacuation. She was sold out of service in 1973 to a private owner who renamed her DOWAGER and converted her into a cruising yacht. In 1998 she was known to be based at Limehouse Basin, London.