Columns: Season | Name | Teams | Relegated to league | Promoted to league | Promoted from league | Relegated from league
2005–06 | National Division Two | 14 | Henley Hawks Orrell | Barking Halifax Redruth | Moseley Waterloo | Orrell | 2006–07 | National Division Two | 14 | None | Bradford & Bingley Cambridge Nuneaton | Esher Cornish All Blacks | Bradford & Bingley Harrogate | 2007–08 | National Division Two | 14 | Waterloo Otley | Blaydon Southend Westcombe Park | Manchester Otley | Halifax Henley Hawks Nuneaton | 2008–09 | National Division Two | 14 | Cornish All Blacks Pertemps Bees | Cinderford Mount's Bay Tynedale | Birmingham & Solihull | Westcombe Park Southend Mount's Bay Waterloo | 2009–10 | National League 1 | 16 | Esher Newbury Sedgley Park Otley Manchester | London Scottish Nuneaton | Esher | Newbury Nuneaton Manchester | 2010–11 | National League 1 | 16 | Coventry | Barking Macclesfield Rosslyn Park | London Scottish | Cornish All Blacks Otley Redruth | 2011–12 | National League 1 | 16 | Birmingham & Solihull | Ealing Trailfinders Fylde Jersey | Jersey | Barking Birmingham & Solihull Stourbridge | 2012–13 | National League 1 | 16 | Esher | Loughborough Students Old Albanians Richmond | Ealing Trailfinders | Cambridge Sedgley Park Macclesfield