London Southend Airport (LSACL) is up for sale, after receiving interest from potential buyers. LSACL, the London Southend and Biggin Hill airports is owned by Regional Airports (RAL). LSACL offers a unique opportunity to develop a major regional airport serving the Thames Gateway, London, and the broader South-East of England region. It is one of the few remaining privately-owned large airports in the UK.