The Board of Trade may from time to time appoint any person to be inspector for the purpose of inspecting F1any railway or station and of making any inquiry with respect to any railway or station or into the cause of any railway accident or any accident at any station which the Board of Trade are authorized to make or direct, and of enabling the Board of Trade to carry the provisions of any general Act relating to railways into execution, or for any of such purposes: F2Provided that no person so appointed shall exercise any powers of interference in the affairs of any company.