The AAA Indoor Championships was an annual indoor track and field competition organised by the Amateur Athletic Association of England. It was the foremost indoor domestic athletics event during its lifetime. Though organised by the English governing body, it was open to all athletes from the United Kingdom, and also to overseas athletes. (Most of the foreign athletes who competed were Irish or UK-based.) It served as the de facto British Championships, given the absence of such a competition during its history. It was typically held over two days over a weekend in February.