War Memorial Hospital Shooters Hill (Anthony Sargeant, Tony, was taken there after colliding with a scrum-half in a rugby match between Old Askeans and Middlesex Hospital losing front teeth in the process.
Shooters Hill is the highest point in South London In The Upsilon Knot, it's where you'd find the London aerodrome. The tower to which the aerships tether might reasonably resemble the famous water tower.
"Munitions workers who had flocked to Woolwich to take up work in the Royal Arsenal soon had experience of the Zeppelin raids. There was an air attack on 25th August 1916 which damaged property in Dickson Road, Sandby Green and completely demolished a house in Well Hall Road all on the new Garden City Estate that had been built to house workers. Three members of the same family were killed."