Administrative arrangements have been in existence for some years whereby all proposals for the erection of overhead electricity cables which may affect the safety of aircraft are referred to the Air Ministry for consideration. If there is any objection from this point of view, the matter is represented to the Electricity Commis- sioners, usually with an alternative suggestion, such as the diversion of the line or the placing of a section underground. The arrangements with the Commissioners are interdepartmental and administrative rather than statutory in their nature. So far as can be ascertained, no scheme for the erection of overhead cables has been abandoned as a result of Air Ministry objections, but a number of lines have been diverted or placed underground.