I have googled, but can't find this as already posted.

Buy a limited edition Back the Bid phonecard or NPN to a FREEPOST address:

For the same chance to win send your name and address to Post Office 'Back
the Bid' Promotion, FREEPOST ANG9086, St Albans AL4 0BR before 6.7.05. Only
one npn entry per person, one entry per envelope.

Mary