UPDATE
On the terms and conditions from the big brother website term number 1 states
No purchase necessary. For the same chance to win a Golden Ticket, send your name, address and daytime telephone number to: Big Brother Golden Ticket NPN, PO Box 122, Uckfield X, East Sussex TN22 5UU to arrive no later than 2nd June 2006. Only one entry per stamped envelope. Bulk entries or entries sent from trade, consumer groups, agents or third parties will not be accepted. Winners via this route will be notified by telephone by the next working day. Open to UK residents only (subject to the relevant permissions and permits), excluding employees
terms and conditions