I dimly recall from my youth in Cornwall that it was a particular problem if the aircraft ended up too far west - they would leave the South Wales coast, cross the Bristol Channel - confuse that with the English Channel, and then land, lost, at the first airbase they found in Cornwall -thinking they were at least in France.
There is a spectacular book about the Battle Of the Beams written by R. V. Jones, who was the British scientist in charge of countering the German technical advances.<p>I can't recommend it enough, although it is a very in-depth read:
<a href="http://www.amazon.co.uk/Most-Secret-Penguin-World-Collection/dp/0141042826/ref=sr_1_1?ie=UTF8&s=books&qid=1281960791&sr=8-1" rel="nofollow">http://www.amazon.co.uk/Most-Secret-Penguin-World-Collection...</a>
Hallicrafters S-27 ftw!<p>As one of my EE professors stated, "In RADAR, the odds are stacked in favor of the jammer". While this isn't radar similar principles apply.