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Old 13th October 2002 | 12:44
  #10 (permalink)  
ATCO Two
 
Joined: Jun 2001
Posts: 557
Likes: 0
From: Hampshire UK
EGWU

Canberra,

It wasn't that long ago that the elevation at Northolt changed from 131ft to 124ft, and Biggin Hill from 518ft to 517ft. Maybe a change of aerodrome reference point, or more accurate methods of measuring? WBS will know.
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