The Open Guide to London: the free London guide

WoLAS are a group of amateur astronomers who meet monthly, including stargazing sessions and talks. This group is open to everyone - no level of prior technical knowledge is required, nor is owning a telescope.

The meetings take place monthly, on the second Monday of the month. See the website for more details. Note that the name of the society is West of London astronomical society, and they do meet outside London. London has far too much light pollution for effective observing.