asked the Secretary of State for Defence what will be the estimated cost of the visit of the Royal Yacht to Mexico; and what is the current running cost per day for the vessel on oil and fuel.

Costs are calculated on an annual basis. For 1974–75, during which the visit to Mexico will be made, the total costs are estimated as about £1·5 million and the costs of petrol, oil and lubricants as £112,000.