Separate Deputy Heads for each of the individual buildings attempted to encourage pupils to aim high and "seize the day" (the English translation of the new school's motto, still in use today).

Also during this period, starting in November 1975, Deputy Head Brian Tyler (later featured in a BBC TV series about another comprehensive of which he became head) instituted what became a regular exchange programme for a number of years between students in the upper years of the school and Eton College in nearby Windsor.

The appointment of Paul M. Grant as Head Teacher on the retirement of Percy Bambury in 1976 led to improvements in both discipline and standards.

A sixth form centre and additional facilities for pupils of 15–16 years, necessitated by the raising of the school leaving age in 1973, had led to the construction of what became known as the ROSLA block on the Browells Lane site.

The school continued working on two sites, i.e. the old De Brome ("Lower East") building and the Browells Lane (Tudor) complex, with pupils having to move between both via a purpose-built footbridge across the main road during breaks until the new Maths, Science, IT, and Library building was opened in 1985.

Once open the former De Brome Boys School or East Building was closed, again with the exception of the gym.

The De Brome building as a whole has however since remained in largely educational and Youth Service use, initially as a Road Safety Centre for the borough of Hounslow, and now as the Feltham campus of West Thames College, which offers mainly tertiary and technical education for the 16-19 year age group, though some provision is also now being made for younger pupils post-14 to study technical subjects here.

The final stage of development, a new sports complex, was delayed due to council cuts.