Found 23rd Jan
On their mailing list and receuived what looks to be a unique code. "2FOR1 T&CS apply. Valid Sun-Thurs 15th-31st January 2018. Applies to à la carte main courses only. 2 diners & 1 voucher required to redeem. Lower priced dish will be removed from the bill. Not to be used in conjunction with any other offer or special menu. We reserve the right to withdraw or change this offer at any time. "