When the
United Kingdom Government passed the
Butler Education Act in 1944 a
Tripartite System was established dividing secondary schools into three categories,
grammar schools,
technical schools and
secondary modern schools. The grammar school was deemed the place of education for the academically gifted (as determined by the
11-plus) and Kingsbury County School was selected to become the grammar school at which point the school changed its name to Kingsbury County Grammar School. The headmaster, Dr Payling (who had succeeded Mr Tracy after his retirement in 1949), saw the beginning of extensions in 1954. At this point in time, Kingsbury was also being served by a second mixed secondary school, which was chosen to become the area's secondary modern school after the 1944 Act was passed. The increase in the population of Kingsbury had continued unabated and building had started on a second mixed secondary school at a site in Bacon Lane in 1939 but this was not finished, mainly due to constraints placed in the continuation of the building by the
Second World War. In the meantime,
Kingsbury Secondary Modern School began operating from the converted ex-
Airco building, which had been vacated by Kingsbury County School in 1931. In 1952, what were to be Tyler's Croft county secondary schools, were opened as separate boys' and girls' secondary modern schools, and the pupils from the mixed Kingsbury Secondary Modern School were transferred to the new schools on Bacon Lane. == Adoption of the comprehensive system ==