Hi, I live in Mortimer and know of three but can't be 100% sure if they fit the criteria as I've never actually stabled there but know they all have outdoor schools.. one called Bridges farm located on the bend of Longmoore Lane. One called Brocas Land farm and one called Wheats farm. I know Wheats has a website with contact details on and Brocas in run by a lady called Tracy Bywater but don't have any actual contact details.
Almost opposite trunkwell house. Its called Priory farm. 24/7 turnout, indoor, unlit outdoor, undercover tie up. Im not actually on the yard, but know it well. They do also have stabling but I dont think any is free atm.
I also know of a place called Boots Farm, which is out Tadley way, that was diy with a nice school, but unsure of turnout there.