As numbers grew to well over 500 students, more teaching spaces were required and the Bombproof Barracks, conveniently placed between the Main Building and Defensible Barracks, was very imaginatively converted and became the main specialist areas for science, art, home economics, and the library, whilst the Defensible Barracks provided the extra teaching bases.10 With these changes, St. Christopher’s became a First/Middle School which included Gibraltarian Protestant children who were admitted to the school by prior arrangement with the Gibraltar Government.
In 1991, following the departure of the last resident Battalion on the Rock (The Royal Green Jackets), together with further reduction of the Royal Navy and RAF establishment resulted in the amalgamation of both St. George’s School and St. Christopher’s at Europa. By then the combined numbers of children was around 200.11
St. Christopher’s school continued to provide education for services children at Europa for another twenty years until the School buildings and associated lands, including the whole of the Defensible Barracks complex was eventually transferred by the MOD to the Government of Gibraltar as part of its 2011 Lands Agreement. The following year the school vacated the premises moving to Four Corners to become St. Christopher's Early Years Foundation Stage Unit. Meanwhile, all other services children were to be integrated into local schools as from September 2012.
Following the formation of a new Government by the Gibraltar Socialist Labour Party in 2011, the vacant site was quickly identified as a suitable location for the creation of a University in Gibraltar. Plans for the University were officially launched in October 2014 with construction work beginning soon after. The University of Gibraltar was formally established in July 2015, at a cost of approximately £10 million to build. The University was officially opened on the 21st September 2015 by Gilbert Licudi, Minister for Education and Fabian Picardo, Chief Minister.