Thanks for the tip Paul, I had not noticed that. Looking more attentively at the reel - shot at the
November 1, 1917 Lord Mayor's Parade London - it is an amazing time piece.
I was looking with amazament at the 'Women's Land Army' (carrying farm tools - rakes; pitchforks; etc. and some of them riding on a cart piled high with hay).
Of course photographers were all around, so the tank in the show can be seen
here
A better copy of the reel can be seen at Pathe
here. This is a still of the Halberstadt riding in the parade.
Cheers
Kees