...and of course Finn has visited the Old Battery.
[Image from here is not available to guests]
If I recall correctly, the old MoD test site for the Black Night rocket programme is still there, just around the corner.
That was a lost opportunity as apparently there was a choice of funding either this or Concorde. Concorde won but was ultimately a costly, if impressive financial failure while the satellite launch industry (pun alert) really took off. Black Night was reputedly at the forefront of technology at the time with both military and civilian applications.