We have just tried !! to supply the API on the Thomas Cook website, but like 'foreverblue' we only got as far as the Extras page (seating, champagne etc) and it just wouldn't let us go any further - useless. Will try to Email them to see what the probelm is. Presumably if this information is required and not given the flight check in desks will be longer than ever if they have to take the information at the desk.