Hi - I have 4 tickets for the Leonardo Da Vinci Exhibition for tomorrow Sunday January 8th for 12pm to 1230pm entry. Face value of the tickets is 16 pounds each but the cost is 40 pounds per ticket Easiest way to reach me concerning how to arrange is by phone/text on 0796 408 5360. Happy to meet right nearby the National Gallery just prior to your entry in order to facilitate exchange. Cheers,