flights above Clapham jct station

 

   

 It surprised me that around every three minutes (even one min in rush hour)

 you can find a airplane take off from London into sky. I stayed at Clapham jct 

station about 40 mins to seek and record airplanes which has a same regular flight route.

 Thus here is the result:

Around every 0 minute 55 seconds, there will has one airplane through the roof from spot.A --- to spot.B 

 < Date taken from 2010/5/21 20:21 --- 2010/5/21 20:26 >

So i could make red spots or something more interesting to hint the phenomena to passenger who can never notice that when waiting for the trains.