by the Secretary of State in respect of the supply by him of any appliance or vehicle which is, at the request of the person supplied, of a more expensive type than the prescribed type, or in respect of the replacement or repair of any such appliance, or the replacement of any such vehicle, or the taking of any such action in relation to the vehicle as is mentioned in section 46(2).

by persons providing general dental services F1 in respect of the supply, as part of those services, of any dental F1 appliance which is, at the request of the person supplied, of a more expensive type than the prescribed type or in respect of replacement or repair of any such appliance.

by a National Health Service trust in respect of the supply by them of any appliance or vehicle which is, at the request of the person supplied, of a more expensive type than the prescribed type, or in respect of the replacement or repair of any such appliance, or the replacement of any such vehicle.