34.—(1) The responsible person for any premises shall not use a gas appliance or permit a gas appliance to be used if at any time he knows or has reason to suspect—
(a)that there is insufficient supply of air available for the appliance for proper combustion at the point of combustion;
(b)that the removal of the products of combustion from the appliance is not being or cannot safely be carried out;
(c)that the room or internal space in which the appliance is situated is not adequately ventilated for the purpose of providing air containing a sufficiency of oxygen for the persons present in the room, or in, or in the vicinity of, the internal space while the appliance is in use;
(d)that any gas is escaping from the appliance or from any gas fitting used in connection with the appliance; or
(e)that the appliance or any part of it or any gas fitting or other works for the supply of gas used in connection with the appliance is so faulty or maladjusted that it cannot be used without constituting a danger to any person.
(2) Any person engaged in carrying out any work in relation to a gas main, service pipe, service pipework, gas storage vessel or gas fitting who knows or has reason to suspect that any defect or other circumstance referred to in paragraph (1) above exists shall forthwith take all reasonably practicable steps to inform the responsible person for the premises in which the appliance is situated and, where different, the owner of the appliance or, where neither is reasonably practicable, the supplier of gas to the appliance.
(3) In paragraph (2) above the expression “work” shall be construed as if, in the definition of “work” in regulation 2(1) above, every reference to a gas fitting were a reference to a gas main, service pipe, service pipework, gas storage vessel or gas fitting.