My post still stands. You have to ring them.
"† Your security number is a 6-10 digit number chosen by you, which you may have already used to identify yourself to us over the phone. If you don't have a security number, you can call us set one up now on 08457 400 004 (or Textphone 18001 08457 125 563) or +44 1142 031106 from outside the UK. Lines are open 8am to 10pm every day (except Christmas Day, Boxing Day and New Year's Day). To help us continually improve our service and in the interests of security, we may monitor and/or record your telephone calls with us."











