Did you end up booking? Your next challenge will be finding reasonably priced hotels (assuming you are going to central London), when booking with a days notice. Hotel prices have been eye-wateringly expensive in London recently!
i ended up booking. The meeting is rescheduled till next week as i was not the only one who could get a good flight. When i was flying i would not stay over as i have a meeting in France on friday. I usually do not stay over in the middle of london as it is to crowded and overpriced.
i did book 3 other flights today for the month of August bringing my total waiting flights till the beginning of October to 16 single flights.
i need to plan one other trip to heathrow, and in the evening to madrid. Just waiting for confirmation of my US peers if they can make it.