John Kemp (1926–1987) created and ran the East Coast Sail Trust, a charitable institution devoted to both character building for young people through education at sea, and preservation of Thames sailing barges. The Trust has been running for over 40 years, during which time many thousands of young people from Britain and around the world, have benefited from the experience that is provided. His earlier work on the preservation of Thames sailing barges was instrumental in the continued existence of the fleet today. He was also the author of three books and a prolific writer of newspaper and magazine articles.

Thalatta is a Thames sailing barge, built in Harwich, Essex, in 1906 and rebuilt in St Osyth in 2012. She is 90 feet (27 m) long and 26 feet (7.9 m) across the widest part of the deck. Like all Thames barges, she is flat-bottomed and has leeboards instead of a keel. She spent some of her life ketch-rigged and some of it spritsail-rigged. She is now permanently spritsail rigged, and has a mainmast and topmast that, together, are about 90 feet (27 m) high, and a mizzen mast. Thalatta has had two periods with an auxiliary engine and two without. She carried cargo for sixty years and was then converted for use as a sail training ship in 1966. She was completely rebuilt between 2006 and 2012 at St Osyth with assistance from lottery funds.