In Scotland this offer is in the Daily Record.
From Saturday 24th October we are giving away 12 Lego Toys for you to collect along with a play mat and collectors box.
This will be by voucher redemption at WH Smiths and Toys R Us in England (Smyths in Ireland and in Scotland, McColls and Toys R Us i think)
For postal redemption you will need 7 vouchers and a cheque for £8.99 payable to MGN Ltd., send these along with the postal redemption form to
Mirror Lego Offer
PO Box 400
Postal redemption ends Monday 16/11/09, allow 28 days for delivery.
The Daily Mirror costs 45p Monday to Friday, 65p on Saturday and £1 on Sundays
See first post for the toys involved - now updated with more details
I will update the OP when more details are known