The ANO may be garbage but it's the primary legislation
It is certainly very poorly written - doubtless the result of many years of patches applied to plug one or another dodgy practice in aviation.
A lot of the rest of the stuff coming out of the CAA is personal opinion of some ex RAF navigator, pretending to be law. A great deal of the bandwidth on pilot forums is over that sort of stuff.
LASORS, AIUI, contains a lot of regulation in areas where the CAA is authorised to make regulation without reference to Parliament.