Isthmian League to add a third regional division at Step 4 as part of further restructuring in the National League System, reducing all divisions at Step 4 to 20 teams. The new division started play in the 2018–19 season. Current Isthmian League members Premier Division Aveley Billericay Town Bishop's Stortford Bognor Regis Town Bowers & Pitsea Brightlingsea Regent Canvey Island Carshalton Athletic Corinthian-Casuals Cray Wanderers Enfield Town Folkestone Invicta Haringey Borough Hastings United Herne Bay Hornchurch Horsham Kingstonian Lewes Margate Potters Bar Town Wingate & Finchley North Division AFC Sudbury Basildon United Brentwood Town Bury Town Coggeshall Town East Thurrock United Felixstowe & Walton United Gorleston Grays Athletic Great Wakering Rovers Hashtag United Heybridge Swifts Hullbridge Sports Lowestoft Town Maldon & Tiptree New Salamis Stowmarket Town Tilbury Witham Town Wroxham South Central Division Ashford Town (Middx) Basingstoke Town Bedfont Sports Binfield Chertsey Town Chipstead Guernsey Hanworth Villa Leatherhead Marlow Merstham Northwood South Park Southall Sutton Common Rovers Thatcham Town Tooting & Mitcham United Uxbridge Walton & Hersham Westfield South East Division Ashford United Beckenham Town Burgess Hill Town Chatham Town Chichester City Corinthian Cray Valley Paper Mills East Grinstead Town Faversham Town Haywards Heath Town Hythe Town Lancing Littlehampton Town Ramsgate Sevenoaks Town Sheppey United Sittingbourne Three Bridges VCD Athletic Whitehawk Champions For the 1973–74 season, Division Two was added. For the 1977–78 season, Division One was renamed the Premier Division, Division Two was renamed Division One and new Division Two was added. For the 1984–85 season, Division Two was reorganised into North and South regions. For the 1991–92 season, regional divisions Two were merged and Division Three was added. At the end of the 1994–95 season, Enfield were denied promotion to the Conference. Their place was taken by Slough Town who finished as runners-up. For the 2002–03 season, Division One was reorganised into North and South regions and Division Three was disbanded. For the 2004–05 season Division Ones North and South were merged. For the 2006–07 season, Division One was reorganised into North and South regions and Division Two was disbanded. For the 2018–19 season, the South Division was reorganised into South Central and South East divisions. Promoted Since the league's formation in 1905, the following clubs have won promotion to higher levels of the English football league system - Asterisk indicates club was promoted via play-offs Sponsorship The Isthmian League was the first league to have sponsorship, having