The Foundation Family comprises organisations that are affiliated to John Lyon's Foundation:
Through franchise arrangements and under licence from the Governors of the Foundation, the three International Schools operate under the Name and Badge of Harrow School.
Harrow Club W10 was founded in 1883 as a Mission Church and Youth Centre in Notting Dale by former Head Master of Harrow School, Montagu Butler. Today, it provides educational and recreational opportunities for some of the most vulnerable and disadvantaged people in London. It has been awarded a Gold Quality Mark by London Youth as a flagship example of an effective and well-run youth and community centre.