When the wind is strong from the south west it is standard practise to use 27L for landing due to turbulence from hangers on approach to 27R. this incident had no bearing on de-alternation.
The problem is that a strong SW wind gives a stronger headwind component. The landing rate suffers as a result, so delays go up.
Then we use the departure runway to land an extra 6 per hour (TEAM). I believe the aircraft yesterday was allocated the departure runway (27R).
Maybe if there wasn't so much pressure put on the landing rate by airline management we wouldn't be exposed to these risks.