No.4 was delivered as a standard 56 seat closed-top double-decker bus,numbered No.104. Its seating capacity was increased by 3 seats to 59 during 1961. In 1971 it was one of four vehicles of this type that were chosen for conversion to open top form to replace the four ageing 1935 Leyland TD4s that worked Service 25 along Southsea Seafront. Two more were converted in 1972. No.4 was withdrawn in 1980, its replacement being one of five Leyland Atlanteans that were converted to open top from 1977 onwards. It was acquired for preservation in 1980 and passed through two further owners until it eventually passed to us in 1991.

CPPTD is a constituent of the Working Omnibus Museum Project Ltd, a registed educational charity no. 10204111.