High Quality Content by WIKIPEDIA articles! The British Stammering Association (BSA), a charity since 1978, is a national membership organisation in the United Kingdom for adults and children who stammer, their friends and families, speech and language therapists and other professionals. Based in London, it is run by people who stammer. BSA promotes awareness of stammering, offers advice, information and support to all whose lives are affected by stammering, initiates and supports research into stammering and identifies and promotes effective therapies. It describes stammering as a neurological issueand estimates that about 700,000 people in the UK have a stammer.