Rob wrote...
in the high winds today an old rosemary bush we have, about 3 feet
high, has snapped across the trunk. Other than cry, is there anything
I can do that might help it root again?

Just about the easiest things to root, the old stump will resprout and also
use any green bits as cuttings. Cut them about 4 inches long, pull off the
leaves on the bottom couple of inches and push them into the ground (yes,
outside) they will root OK, well a high proportion will.

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Regards
Bob
In Runnymede, 17 miles West of London