Gosport, Hampshire, England, United Kingdom
In this house, when used as the Officers Mess of Grange Airfield during WW1. Major Robert Smith-Barry, RFC 1886 - 1949 (later Lt-Col, AFC, RAF.) established a system of pilot training, which is still in use now, and developed the Gosport tube for communicating in aircraft.
Listen to the audio guide for Blue plaque № 30641 Free on WIP — starts by itself when you arrive, even with the screen off