Hi Jenann
According to my little book 'The Crumbles Story' by Anne Botha published by S B Publications there was a TB sanitorium at Langney Point in Eastbourne. It opened in 1895 and was an isolation hospital for allsorts of infectious diseases such as Smallpox, scarlet fever, diptheria etc. It closed in 1940 and was demolished during the war.
It is now under what has become Sovereign Harbour.
Kerry