Agree Mambo with your ghost bidders I seen it a few years ago and to prove the point with the company I was with I bid to £240 and then pulled out the bidding was rigged.
If it's any help to answer your question, go into as the crow flies this will give you distance plus line of flight depending on wind direction,hope this helps
Congratulations to all who took part in the inland national especially all prize winners and a special congratulations to you Micheal whom I met once you left a lasting impression top pigeon man.