Hempy,
An interesting sideline was the "accidental" bombing of Dublin by the Luftwaffe several times during WWII. A popular myth ascribed this to our ability to "bend" the Knickebein ("Crooked leg") beam navigation system used by the Luftwaffe, and so deflect bombs intended for (say) Liverpool to Dublin (this would hardly earn us Brownie points over there !)
Seems there was no truth in it. Google: "The Battle of the Beams". Wiki knows all about it.
Danny.