That is not what I would call a double header. Miners best chance of winning is at Twist Lane. There would be more on there too than at LSV unless a proper double header could be arranged (which would be awesome). If Wath Brow could play at home against Newcastle then a precedent has been set and Leigh Miners should exploit it
I believe the Rules regarding Suitability of Ground, change after CC 3rd Round. Plus Gateshead were happy to play at the Brow.