Every two years the school organises an expedition slightly further afield than normal school trips would go. This is coordinated by the Head of Duke of Edinburgh. The expedition is run during the summer holiday on a two year cycle. The expedition is launched just under 2 years prior to that via an evening presentation to pupils and parents in October. This event will be promoted by posters, IS-Post and other school media. Letters will be issued to interested families and those participating in the expedition will then set up an 18 month fund raising and training programme. Where possible the trip will involve some community work in the chosen destination.

The presentation will be open to pupils in Year 10 and 11 and the expedition will therefore take place at the end of their Year 11 or Year 12. Previous School expeditions have journeyed to India, Peru, Ethiopia, Ecuador and Borneo. In 2018, the school became one of the first in the UK to journey to Uzbekistan and Tajikistan, where the pupils were able to explore the Silk Route cities of Samarkand, Khiva and Bukhara.

Because of the adventurous nature of these trips, they are not suitable for all pupils at the School.