Very affordable, easy walking self guided tour, sp...

Very affordable, easy walking self guided tour, spiral staircase on some towers are not suitable for folks with balance issues and are not wheelchair accessible. Restrooms / "toilets" are accessible and free. A must see and an easy 2 to 3 hours self guided tour. Very rich in history and highly recommend to add it to your London UK intenerary. Kids of all ages can go in as well.