Ziggy – If you are being left off the list when official documents, correspondence etc are circulated then that is a matter of concern. Send an email to the Secretary and the BCM and remind them that you need to be included on their official contact list.
However, if its just committee members privately contacting each other to discuss an issue then there is nothing that you can do about that. It is not unreasonable to have an informal chat via email, just as it is not unreasonable to have an informal chat in the hallway of your building.