The RBW British Middleweight Championship was a mid-card title contested for in Revolution British Wrestling. It was revival of an earlier title competed for in British wrestling since before the Second World War.
After G.N. Promotions split away from RBW in July 2004, the promotion would take its Middleweight title (known in RBW as the British Mid-Heavyweight Championship) away from RBW. RBW would later decide to crown its own Middleweight Champion with the creation of the British Middleweight Title.
The championship was created out of a four-man tournament which saw "Golden Boy" Cameron Knite qualify over "Sadistic" Jack Storm during December 2003 in Sheffield while Johnny Kidd overcame "The Gift" Ross Jordan in Nottingham during December as well to qualify.
The final was held in Enfield, London on January 24, 2004, and saw Johnny Kidd defeat Knite, two falls to one, to be crowned first champion.
On May 22, 2004 in Hitchin, Hertfordshire, "Misfit" Jorge Castano defeated Johnny Kidd for the Championship, in his third attempt, following previous contests between the two in Chingford and Nottingham, and would hold the belt until RBW's eventual closer in late 2005.