thanks for getting back so fast, much appreciated! You can see the privacy settings here:
The group ID is 223094877746938
Within wordpress, these are the settings I have used:
And these are the results in the sidebar:
So I'm not sure why it isn't working.
There is something which might be related. I'm wondering if FB have recently changed the way they handle RSS feeds. Within the group, there is the Groups to RSS option. This generates this feed;
Looking at this via my normal reader, Feedreader 3.14, it works fine. But if I try to look at it via IE or firefox, it fails to load anything, and IE says it contains code errors.
Thanks again for your help!