Maybe use the Scottish system where the lowest NPL side play the top New-FM side in a one-off play-off game. Anyway that aside, look at Valo as an example. They were relegated two seasons ago and have continued to build their side and look on track for promotion this season. Does anyone happen to know if Wallsend can be promoted, I remember seeing something saying Valo and Lakes were the only sides but not sure. Their ground is decent at the Gardens.