DATELINE 1PM - ARTILLERY FIRE HEARD OVER EDINBURGH

Aka, the one o'clock gun, which locals ignore entirely as it's every single day but always surprises a tourist: https://www.edinburghcastle.scot/see-and-do/highlights/one-o... . There is actually a small barracks on the site as well, https://en.wikipedia.org/wiki/Redford_Barracks ; the city as a whole contains a few more barracks for various units, including a signals unit conveniently located near the main telephone exchange.

Redford Barracks is quite a bit out from the centre of Edinburgh - hardly "on the site"?

.. correct, a good old fashioned non-AI mis-googling error. The castle barracks is the "New Barracks", so called because it was built in 1799, and I saw the blocky stonework construction and went "close enough". Sources are a bit vague on how currently used it is. https://edinburghtourist.co.uk/questions/who-lives-edinburgh...

Parts of Edinburgh Castle are still used by the army - I doubt there are many trucks or squaddies based there though:

https://en.wikipedia.org/wiki/Edinburgh_Castle#Military_role

Yeah, fair point. I was just not sure if they have enough troops to take the parliament in any meaningful sense (not that this stuff should really be taken seriously).

Of course, if there are pipers involved, then everyone better watch out ...