Aidan Foster is a mundane astrologer based in Cambridge, England, specialising in the astrology of nations, world affairs, organisations, and elections. Astrological study began in the late 1980s following an early encounter with John Addey's harmonic theories, and harmonics remain a central pillar of the practice. Formal qualifications include a Certificate in Astrology from the Faculty of Astrological Studies (2004), an MA in Cultural Astronomy and Astrology from the University of Wales, Lampeter (2012), and a Certificate and Diploma in Astrology (natal and mundane) from the Mayo School of Astrology (2020 and 2022). Professional affiliations include the Astrological Association (UK), the Association of Professional Astrologers International (APAI), and the Astrological Lodge of London. Consultations are conducted via Zoom or in the form of written reports, primarily covering mundane topics. Research and writing are currently the main focus of activity.