We are sympathetic to those affected by the collapse of Thomas Cook. There is an ongoing process of liquidation which is in the hands of the Official Receiver. Passengers with ATOL protection are entitled to a full refund on any future bookings and the CAA publishes the process to follow after the insolvency has taken place.
Government advise customers without ATOL protection to speak to their credit card provider or the company they booked their holiday with. Passengers should also speak to their travel insurance provider to see if they are able to claim back any of their costs.