You can easily walk to and from Terminal 5 to the hotel. We came into London on an early evening flight from Paris. After clearing customs, ask directions for walking to the Sofitel. It is on a different level, but only 5 minutes. The room was really nice. The bathroom was really nice, too, but throw some towels on the floor because the shower can make the floor quite wet. It was totally quite in our room, and our wake-up call was reliable. We walked back to Terminal 5 the next morning, having never gone outside. This is the place to stay for overnight international connections.