saw this ad when i was signing in to msn earlier. hope its useful for someone. It said that is is only for today but u can never be sure with these things!
Free Online Pay & Go SIM
Just complete the form below and you will get 500 FREE texts every month. Or, if you're more of a talker than a texter, you may prefer to select one of the other free allowances available with your Online Pay & Go SIM. Choose either 100 FREE anytime any UK network minutes or 150 off-peak any UK network minutes every month - the choice is yours. Details of how to select the option you prefer will be sent to you with your SIMs. Whichever you choose, you'll also get 1MB free browsing and downloading every month, and lots more.
Remember, this offers only available online, so make sure you let all your friends know too.
If you want more than one SIM, say now because we can only accept one order per household.
Offer subject to availability.