From 1920 to 1941, the asylum was known as Caterham Mental Hospital. In 1930, administration of the hospital passed to the London County Council. It then had 323 beds plus a nursery unit. In 1941, it became St Lawrence's Hospital and continued to provide care for the mentally handicapped. In 1974, the hospital came to public attention with the publication of the book Tongue Tied by Joseph ('Joey') John Deacon who had been a patient at the hospital since the age of eight in 1928. This was followed by the TV documentary Silent Minority in which the hospital featured in an unfavourable light.