Mark Thomas (Channel 4) Secret Map Of Britain

Maybe, like me, you had not seen this YouTube video before. Mark explores some of the places left off some UK maps to preserve their secrecy. In many cases the information is readily available by other means. Apparently the number of places left off maps runs into thousands (at the time the film was made) and yet many places which you might expect to be hidden are not. Bizarre.

At one time Devonport Docks (Plymouth) were blanked out from 1:25000 scale OS maps. Not sure if this is still so. Looking at the map it was very obvious this was a secret place and no doubt a prime Russian target back in the Cold War.  Blanking out the area drew attention to it - the reverse of the intention. Doh!

I make no judgments, just sharing an interesting YouTube link.  I assume sharing this publicly available YouTube video does not contravene any state secrets. Mark filmed this for Channel 4 TV here in the UK.