Mazzy,
SquawkIdent makes a good point. Unless you already hold a valid Flight Radio Telephony Operator's Licence, using your scanner is illegal. See the Ofcom website for more details:
http://www.ofcom.org.uk/codes_guidel...ofw156?a=87101
My interpretation of this is that ATC transmissions are not "general reception transmissions" (that is, they are not meant for the general public, but for specific parties), and therefore under section 5(1)(b) of the Wireless Telegraphy Act 1949, only licenced operators are entitled to listen to the transmissions.
Under the "general reception" section, there is talk of "navigation transmissions". I believe this refers to GPS, TrafficMaster, etc. rather than ATC.
Of course, there is a big question over the likelihood of getting caught...
TPK
