24/7 access self storage units in Kings Cross, London. Welcome to the second addition to the Attic portfolio in London. Like all Attic Self Storage sites, Kings Cross offers a range of convenient and flexible storage units from simple mail boxes up to 350 square feet. Our complimentary 24 hour access to individually alarmed units means that you can be certain your things are safe whilst knowing you can access them whenever you need to - 365 days a year.