Teams compete for the National Sevens Circuit title by accumulating points based on their finishing position in each tournament.

The cup for this annual competition was presented by 223 Squadron, Royal Air Force and the competition was open to all clubs in East Africa (i.e. within Kenya Colony, Uganda Protectorate and Tanganyika Territory) and any other combination of players who wished to enter a team.

The tournament was usually played over the August Bank Holiday weekend and was a very popular addition to the Kenya rugby and Nairobi social calendars.

The winner is presented with a mounted silver rugby ball known as the Krell Trophy which was presented in 1951 for this purpose by Mr. Cecil Krell who had done valuable work for rugby union in East Africa in both Dar es Salaam and Mombasa.

[2] Ironically, having been named for someone who had demonstrated unparalleled longevity, the Jones Cup was to have a remarkably short tenure as a seven-a-side trophy.