Roseburn Park in WW2 film

Pete Gregson writes:

See this film- two minutes in, as a mob of WW2 Wardens try to cross the Water of Leith at Riversdale on their bikes, to get their vital message to the Armoury:

.. and you can see the Wardens actually getting there, 17 minutes later in the film, as the reports arrive at the Armoury.

See within, the ladies behind hatches taking secret messages – in what I can only imagine is the wall near the Cricket Club’s tea urn.