I have a spare sim card available from January 08 onwards, I am offering to sell it for £140 and it will give u 600 national calls (includes the special numbers which allow you to call different countries for free) and 500 text messages. This will be valid from February to November 2008 i.e £140 for 10 months!! For 600 calls n 500 texts u would usually have to pay up £35 a month and you will not be allowed to get a contract if you have been in uk for less than six months.
Let me know if you want to talk more about it at dearunna@rediffmail.com
cheers!