I have been asked to reply.
Details of the costs of the proposals were given in the Consultation Document published by the Health and Safety Commission, and have since been revised. The total cost to businesses, charities and voluntary organisations of the proposals are currently estimated at £4.2 billion over a 50-year period. This includes a relatively small number of Government buildings open to the public, and also includes the estimated costs of complying with the provisions in the regulations arising from the Chemical Agents Directive. This cost is equivalent to £2.9 billion once costs are discounted to present values following Government costing conventions. The average yearly cost over the first six years the proposals would be in force is £460 million.