Not just on Easterlies. Quite often on westerlies too.
Let me just reiterate that........For the next x amount of years until T5 is finished, very often the 'departure' runway is closed to arrivals.
I think for the purposes of this thread, the fact that we can 'recall' the runway in a given timespan is irrelevant. What would be the effect of no landings at all at LHR for, say, half an hour? I'm guessing not many of those who were holding when the landing runway was closed would still be around ion the stacks!