Eastern Counties 1 is an English level 9 Rugby Union League. From the 2017-18 promoted teams move up to the newly created London 3 Eastern Counties with the league champions going up automatically, while relegated teams drop down to Eastern Counties 2 (split into three regional divisions - north, south, west). Teams in this league tend to be based in Cambridgeshire, Norfolk or Suffolk. In the past teams from Essex used to take part until the 2003–04 season when they formed a new league - with Essex 1 being the top division. Each year some of the 1st XV clubs in this division also take part in the RFU Junior Vase - a level 9-12 national competition.