In July 1948 the Tavistock Clinic entered the NHS, coming under the Central Middlesex Group Hospital Management Committee of the North-west Metropolitan Regional Hospital Board.
Joining the NHS exposed the Tavistock Clinic to a much larger and wider patient group. However, sacrifices had to be made as it was primarily the clinical work that the NHS took over. In order to keep its research and educational work alive this transferred to the TIHR and this kept the relationship between the two organisations extremely close.