asked the Chancellor of the Exchequer (1) whether he is aware that the Commission of the European Economic Community has proposed a system of double tax-free allowances for persons travelling from one Community state to another; and if he will double the tax-free allowance of all persons entering this country from any of the countries of the Six and give the estimate of the cost of such concessions;(2) whether he is aware that travellers from the countries of the Six are allowed to bring through the customs $75 worth of tax-free goods and the Commission of the European Economic Community has proposed allowances of 400 cigarettes, one kilogram of coffee, one bottle of spirits or three litres of aperitif wine and four litres of wine; how these compare with Great Britain's tax-free allowances; what action he proposes to take to harmonise these tax concessions for visitors from the Six; and what is his estimate of the costs of such concessions;