English Electric-Leo-Marconi Computers
1964 The English Electric LEO Co became a wholly owned subsidiary of the English Electric Co. English Electric then merged the computer interests of its Marconi subsidiary with English Electric LEO Co to form English Electric-Leo-Marconi Computers.
When the time came for a new range, English Electric went across the Atlantic to its partner, RCA, rather than developing the Leo marque, though installations continued to operate very successfully for several years afterwards. EELM worked with RCA to re-engineer the RCA501 to become the KDP10 (later the KDF8), aimed entirely at the emerging commercial marketplace.
The KDF9 was another computer developed at Kidsgrove. It was technologically independent of the earlier machines, and was attractive to computing-intensive customers.
1967 Under the Industrial Expansion Act, English Electric Leo Marconi was merged with Elliott Automation - the computer activities were put together in English Electric Computers Ltd
1968 English Electric Computers Ltd was taken over by International Computers and Tabulators (ICT) to form International Computers Limited (ICL). By this initiative, the Ministry of Technology aimed to create a British computer industry that could compete with major world manufacturers such as IBM.