https://www.google.co.uk/maps/@51.5219407,-0.1548686,3a,37.5y,111.41h,79.74t/data=!3m6!1e1!3m4!1srH7vpygMvgsAAAQfCZi7hQ!2e0!7i13312!8i6656!6m1!1e1

anyway, the SAM got a bit lost in the warren underground...but eventually made it up 'here'...to leave their 'mark' as it were...go figure: