Safe, Secure and Affordable Self Storage Space. BWI Self Storage has relocated from South Woodford and opened a brand-new self-storage facility in Woodford Green. The family-run self-storage facility caters to both business and personal storage. BWI Self Storage is conveniently located at Woodford Trading Estate on Southend Road, providing you with easy access to the units seven days a week. We offer individual storage units ranging from 10sq ft to 250sq ft.