We're in central Berkshire and depending where we go we can pay from £5 (regardless of numbers of riders) to 15 per horse, this is for an arena with full set of jumps 60x60 arena or in one place a small indoor school, and includes lights. (However I'm sorry I'm not able to share the info as have worked hard to find venues / facilities at the lower prices as we don't have our own arena and even our usual grass riding at our neighbour's when ours is too wet has been under water, and for some we are now on mates rates levels for regular use)