Welcome to UK BSD Groups
There are several BSD groups in the UK which meet regularly. These include Manchester and London. The FreeBSD UK Users Group is also active, having a manifestation on mailing lists and servers, rather than in a more physically social form.
The locations listed, unlinked, on the left have multiple people who may be interested in attending a group, but who haven't actually organised anything yet (picking a pub and a date is how the Manchester group started). If you are interested in a Cambridge group, contact Robert Watson (rwatson AT freebsd.org).
This site should probably include other things. Let me know what.
Thanks to Brian Somers for DNS, hosting and mailing lists.