Instructions:Print off the PDF voucher from the link and take it to one of the following GBKs:
"When purchasing any GBK main course receive another with our compliments. The less expensive dish of the two will be free. Offer exclusive to participating restaurants only after 3.00pm Monday to Friday, and all day Saturday & Sunday and is eat in only. Not to be used in conjunction with any other offer(s). Offer closes 15th September 2008.