About 15 years ago we did an all flaps up landing at LGW in a 732. I remember the aproach speed was just under 200 knots, back to about 195 for landing. Very fast, after warning ATC twice we would be on a very high speed approach, we were astonished as we switched over to tower to see a 747 taxiing onto the runway. Sudden consternation from Tower controller- we touched down as the 747 lifted off- rather more wake than would be preferable. With full reverse and hardly any braking, stopped at the usual intersection. Always bear in mind ATC must be totally aware.