Having moved base specifically for these reasons, no doubt if the Royal Helicopter needs to go to / fly past an area containing risky structures such structures will be dismantled accordingly, and mantled again after the flight passes.
What a nonsense story. My children can work out that the "reasons" don't fit.
Totally off-subject but on topic for "the press don't care about accuracy so long as they have a story", here is one from Wimbledon a few days back.
Scroll down tot he picture of Nicole Scherzinger...... except..... it isn't, it's one of my team.
Harry Potter author J.K. Rowling sprinkles some magic onto Centre Court at Wimbledon | Mail Online