There will be 17 clubs at level 5 for the 2018/19 season from the Northern Counties (Cumbria, Northumberland, Lancashire, Durham, Cheshire and Yorkshire)
They are as follows:
Alnwick
Billingham
Blaydon
Doncaster Phoenix
Harroagte
Hull
Ilkley
Kendal
Kirby Lonsdale
Lymm
Rossendale
Sandal
Sandbach
Sheffield
Vale of Lune
Wilmslow
Wirral
Before any movement is decided by the RFU there are currently:
12 clubs at level 5 for the 2018/19 season from the Midlands Counties.
13 clubs at level 5 for the 2018/19 season from the South East Counties.
14 clubs at level 5 for the 2018/19 season from the South West Counties.
I predict that Doncaster Phoenix, Sheffield and Sandbach will play in the Midlands Premier and one of the southern based Midlands clubs will move to the South East. This will leave 14 clubs in each of the four regional Premier Leagues.