When I lived in the UK a few years ago, I decided to hire a bugsmasher with the intention of doing a couple of instrument approaches to keep current at a time when I was not employed as a pilot.
The closest place to do instrument approaches from Cranfield (where I hired the aircraft) was Stansted. I was surprised to discover that I had to call approach control on the phone and give them my a/c rego and credit card number <img src="mad.gif" border="0"> , afterwards I would be billed for the number of approaches I did. I think it was 10 quid per ILS.
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