Sandtoft is on the edge of CTA 1 (1500) and CTR 1 (surface). I suspect there is a Letter of Agreement, I understand one is in place for Netherthorpe, which gives a coridor up to Gamston, but I haven't been able to get any details yet...
I fly from Netherthorpe and, from what I can remember from the letter of agreement in the club house (been a couple of weeks since i've been up there so i'll have to have a good look) we've been given an extra 100' above the atz and a corridor in place for transiting accross to Gamston. Any other egnf or egne pilots please correct me if i'm wrong.