There is Barnfield Farm, Nicker Hill Keyworth.
Small (no lights) manege. DIY only. 0115 937 2900
Marson Stables, Normanton on the wolds. Beautiful large floodlit manege. American barn style stables about 10 stables I think. 01159372233 I have photos of this place. http://pets.webshots.com/album/547476814XKSDsk?start=0