Just to add an update: the GBCC merged with the Great Britain Philatelic Society as of November 2019. Members were given the option to transfer over their membership to the GBPS until the end of 2020, and nearly 80 did.
The GBPS caters for anyone with an interest in GB philately and postal history. We have two publications, both published six times a year: The GB Journal, A5 size and in full colour, which contains new research into GB material, and the GBPS Newsletter, A4 size and averaging 36 pages (b/w but in colour on the web), which contains news, illustrated reports of meetings, pages from competition entries, notes, queries, and shorter articles, and pretty much whatever members want to send in! There is also an extensive website with a large amount of information on GB philately (much of which is also made available to non-members).
The complete run of the GBCC Chronicle has been digitized and is available for download by members from the website, along with the complete run of The GB Journal from 1956 to date and the GBPS Newsletter from 2000 (when it moved from being just a newsletter to an actual publication). Members also have access to an archive of scanned displays of GB material (some 90+ as of the time of writing), a discussion board, consultants, a library etc.
We have recently started to hold a series of "Zoom meetings" while face-to-face meetings are impractical due to coronavirus, and we plan to continue these even when normal meetings are restored.
Subscriptions are UK £25, Europe £30, World £36 Airmail/£30 Surface.http://www.gbps.org.uk***The forum rules disallow 'drive-by links' by members without 50 posts; making an exception in this case. - Mod***