There are two discussion forums that enable users to discuss census statistics (and other official statistics) and share knowledge.
StatsUserNet is an online community for users of official statistics. There is a 2011 Census community which was established by the Office for National Statistics (ONS) to keep users informed of developments and release plans. To become a member of the community, you will need to register and create an account. Members can then start and contribute to discussions.
Knowledge Hub is the Local Government Association's professional social network which helps people in local government connect and share online in a secure environment. There is a 2011 Census group and specifically a 2011 Census analysis discussion forum. To view this, you will need to register and create an account, and then apply to join the group.