London 1 North is an English level 6, rugby union league for clubs in north London and the south east of England. The fourteen teams play home and away matches from September through to April. The first placed team in the league wins promotion to National 3 London & South East while the league runner-up plays the second placed team from London 1 South in a play-off for promotion. Relegated teams drop to either London 2 North East or London 2 North West depending on the location of the club.
Barking
Brentwood
Chelmsford (promoted from London 2 North East)
Chingford
Eton Manor (relegated from National League 3 London & SE)
Fullerians (promoted from London 2 North West)
Letchworth Garden City
North Walsham
Old Priorians
Ruislip
Saffron Walden (promoted from London 2 North East)
Sudbury (promoted from London 2 North East)
Thurrock
Tring
Amersham & Chiltern, the champions, are promoted to National League 3 London & SE for next season. There are only two relegated clubs (Harrow and Luton) as East Grinstead took voluntary relegation from the National League 3 London & SE to the Sussex Leagues.
Amersham & Chiltern (relegated from National League 3 London & SE)
Barking
Brentwood
Chelmsford (promoted from London 2 North East)
Chingford
CS Rugby 1863 (relegated from National League 3 London & SE)
Harrow (promoted from London 2 North West)
Letchworth Garden City
Luton
North Walsham
Old Priorians
Ruislip
Thurrock
Tring (relegated from National League 3 London & SE)
Barking (relegated from National League 3 London & SE)
Brentwood
Chingford
Colchester
Eton Manor
Ipswich (promoted from London 2 North East)
Letchworth Garden City
Luton
North Walsham
Old Priorians (promoted from London 2 North West)
Romford & Gidea Park
Ruislip
Thurrock (relegated from National League 3 London & SE)
Woodford
Brentwood
Chingford
Colchester
Diss
Eton Manor
Letchworth Garden City
Luton
North Walsham
Old Haberdashers
Romford & Gidea Park
Ruislip
Tabard (promoted from London 2 North West)
Westcliff (relegated from National League 3 London & SE)
Woodford (promoted from London 2 North East)
Basildon
Beaconsfield
Brentwood
Bury St Edmunds
Chingford
Colchester
Diss
Eton Manor
Letchworth Garden City
Luton (relegated from National League 3 London & SE)
Old Haberdashers
Rochford Hundred
Romford & Gidea Park
Ruislip
Braintree
Brentwood
Bury St Edmunds
Chingford
Colchester
Diss (relegated from National League 3 London & SE)
Eton Manor
Hammersmith & Fulham
Letchworth Garden City
North Walsham (relegated from National League 3 London & SE)
Old Colfeians
Rochford Hundred
Ruislip
Thurrock
Braintree
Brentwood
Bury St Edmunds
Chingford
Colchester
Eton Manor
Hammersmith & Fulham
Letchworth Garden City
North Walsham
Old Colfeians
Rochford Hundred
Ruislip
Thurrock