A UK national society. I joined early in 2005.

My local astronomical society. I've been a member since 2003 (the society itself started in June 2002). I currently hold the position of Vice Chairman.

A UK national society for anyone with any sort of interest in astronomy. I joined early in 2005.

I used to be a member back in the 1980s but let my membership lapse around the same time as I stopped actively observing. Back then it was known as the JAS.

A local astronomical society that covers York and the surrounding area. I was a member from around 1983 until 1986 (that's when I left York to move to Newcastle-Upon-Tyne).