History of Sussex airfields around Sussex. During the lead-up to the D-Day landings, the people of Sussex were witness to the build-up of military personnel and materials, including the assembly of landing crafts and construction of Mulberry harbours off the county's coast. Five new airfields were built to provide additional support for the D-Day landings, four near Chichester and one near Billingshurst. A legacy of the D-Day landings are the sections of Mulberry harbour that lay broken and abandoned on the sea floor off the coast, of Selsey Bill, having missed the invasion. Sussex was an industrial county, from the stone age, with
HMS Hydra (J275) naval part of the D-Day landings at Normandy on 6 June 1944. She was mined in the approaches to Ostend on 10 November 1944. She was towed to Sheerness but declared a constructive total loss and not repaired. She was sold for scrap and arrived at the yard of Thos W Ward in Grays, Essex to be broken up in 1947. HMS Hydra (J275) HMS "Hydra" was a reciprocating engine-powered built for the Royal Navy during the Second World War. She was badly damaged during the war and was scrapped in 1947. The reciprocating group displaced at standard load and