Although a number of areas in aviation are having to come to terms with SMS, UK licensed airports are not. That's because Aerodrome Standards (and Air Traffic Standards) took onboard SMS quite some years ago.
It would seem that the CAA publications that have been issued over the years have gradually started with SMS as a given when addressing airport managers. Funnily enough, CAP 772 the Bird Hazard Bible, when reissued from CAP680, certainly seems to take airports SMS as already in place.
To some extent, that managers at aerodromes keep changing and hence their replacements have to be "programmed" into SMS (not sure if they have it at Costco) is a nub of the problem. But there again the CAA's own management of safety should systematically look for these failings and address them?
Lastly, the flocking birds report is actually from some time ago, I seem to remember it around the millenium.
Sir George Cayley