Freedom of Information Officers are invited to join closed regional groups

[John]

"We can now operate regional closed user groups. These are local
groups where people contribute with regard to local matters. You will
not see a group unless you are a member of one. The main benefits
include confidentiality, NAIM is not subject to FOI, a reduction in
inbox content, an archive of issues etc etc."

"If you are not a member then click the join us link on the left.
Registration is always easier when using a business e-mail address and
public service addresses such as .gov.uk, .ac.uk, .nhs etc. Where
personal e-mail addresses are provided we will usually require
confirmation of your reasons for joining. Acceptable categories do not
include casual interest or non related information management
functions."

http://www.naim.uk.net/

[NAIM stands for National Association for Information Management]

It is clear they are targeting public sector workers who are also
'information managers'.