Offer entitles group to a free bottle of bubbly worth £25.50 when dining with at least 6 full paying adults on a Christmas table booked for between 03/12/18 to 24/12/18. Offer valid Monday to Thursday only. Alcohol is for over 18s only. To redeem the offer, please present your original booking confirmation when being seated. Cannot be used in conjunction with any other offer. Offer subject to availability. COSMO Restaurants reserve the right to withdraw or alter this offer at any time without prior notice. Restaurant manager’s decision is final. Offer valid in COSMO Derby only.