Think of the furore if they shot down a spamcan flying around the IOM.
I reckon the sticky stuff would really hit the fan then, especially as the IOM is over 235 miles North West of the IOW!!!!
If its that important to them, why not request and get a RA(T)? They got restricted airspace for Mr O'Barmy to fly in his helicopter to London..
If it's good enough for some dodgy sports comp in London 2012, i'm sure the USA could swing it with our leaders