By 1962 two further buildings had been turned into hostel wards. There were now 121 beds, with 15 hostel beds in Clatterbridge main hospital. During this phase the physics workshop and the mould room were improved, and a radium store and medical photographic unit were opened in adapted huts.
New equipment provided deep and superficial x-ray treatment sets. Demand for radiotherapy increased rapidly and, with up to 90 patients a day being treated on the linear accelerator, a shift system of working had to be introduced.
In 1966 a second complete treatment unit with a new linear accelerator was installed and treatments began at the start of 1968. This was followed shortly after by the addition of two Cobalt units, as well as planning and dose calculation rooms.