Hi Codes and thanks Tess
(sorry for the delayed reply)
Well, I have a tried and tested format which works well, although it does work best with at least 4 or more attendees so it also depends on how many come. From past experience numbers can fluctuate from 1 (just me!) to 25 (that was a one-off at the group I run in London!). Let me know if you would like a copy of the email I send to people who contact me about the group, which describes a typical meeting (PM me your email address).
Tess is right about the need to steer the discussion and facilitate it so everyone has a chance to speak - some people are more vocal than others (and in some cases that is understandable due to the effect of OCD on sufferers and their families).
You will also find that attendance will fluctuate with some people coming every time and some people just once, so it is important that each meeting is self-contained (with limited 'continuity' between meetings) so that everyone at every meeting gets something out of it and doesn't feel left out.
If just a few people turn up (say 3 or 4) Tess is right that you could just talk informally about OCD, and let the meeting take its own course, with maybe a slightly more formal format for future meetings.
On a practical level I have had someone contact me very keen indeed to find support on the Island. If you could PM me I will put you in touch with her.
Do you know when your meeting is likely to be? It's always best to fix a date and a public location (don't use your own house), and announce it, and people will come (or not, as the case may be - you do have to be very patient!). There's definitely a need, but people have a variety of reasons for not coming to a group - with patience they will come though.
All the best
Stephen