The British Baseball Federation (BBF), manages the official rules and regulations (youth and adult) of baseball in Great Britain. At the start of the season, the BBF plans, develops, organises and implements a new set of baseball rules for the season which are in the BBF Handbook.

The BBF Handbook is made up a combination of BBF past handbook rules, CEB and WBSC rules. However, the primary source of rules (with amendments) is the Major League Baseball (MLB) Rulebook 2019