The BMA has a committee specifically for GPs called the General Practitioners Committee that represents all GPs in the UK. As part of this, it has 11 subcommittees, one of which is the sessional GP subcommittee that meets four times a year:
Members of the subcommittee are able to help to influence the local situation for their fellow sessional GPs, as well as help shape BMA policy and have a say on national issues. In addition, getting involved with the subcommittee gives members an opportunity to network and share ideas and experiences as well as to raise issues of local and national concern with other sessional GPs.
As statements from NASGP members arrive you'll be able to see them here.