by the Secretary of State F1or an NHS trust in respect of the supply by him F2or, as the case may be, by the trust 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 paragraph 1 of Schedule 2 to this Act;

by persons providing general dental services . . . F3 in respect of the supply, as part of those services, of any dental . . . F3 appliance 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.