I completed my PPL with Northumbria Flying School and cannot praise them enough, they have been at Newcastle since the flying club closed and have a good mix of instructors with a lot of experience.
Eshott is unlicensed therefore has unable to provide flight instruction for the PPL; although I believe a NPPL can be obtained at an unlicensed airfield (I might be completely wrong, but i'm sure someone will correct me).
Flying out of Newcastle, despite being a busy airfield is fine as the GA area is on the opposite side of the airfield from the commercial operations and Air Traffic Control are very supportive and will fit you in as soon as possible. Only around 4-5pm in the evening have I ever had to wait more then 10 minutes on the ground or orbit on base.
I last flew with NFS about 2 years ago,