This site helps former pupils of The John Lyon School, Harrow, to keep in touch with the School and with each other.

The Association is active around the world and works with the Governors, the Headmaster and the Development Trust to ensure the School's continuing success and prosperity.

Old Lyonians (OLs) can use it to publicise social or business networking events, catch up with old friends online or find out about the latest OL sporting highlights.