On the BA site, for the sake of simplicity, I looked a WT+ price for one passenger, liked it, and then went back and entered 4. The price for the same flight and class jumped from £813 for one to £4679 for four (so £1169 each). When I revert back to one PAX, the price reverts to £813. I assume I am crossing some price class availability threshold by adding the extra PAX and there are only less than 4 low price seats available. What if four people were to simultaneously try getting the lower price all at the same time on their various computers; would the system allow them to all get the lower price?