During the
First World War Geddes was one of the "men of push and go" brought into government service by
Minister of Munitions David Lloyd George. In 1915 Geddes was selected by Lloyd George and given the title of deputy director general of munitions supply, whereupon he left the NER. Haig and Geddes breakfasted with Lloyd George to demand a new administration in the Admiralty. On 6 July 1917 Geddes, strongly recommended by Haig, returned to civilian life as First Lord of the Admiralty. To serve he had to be a member of the
House of Commons and was elected in
a by-election for
Cambridge. He was sworn into the
Privy Council the same month. ''
The Daily Telegraph's'' naval correspondent, Sir Archibald Hurd, later wrote of Geddes and Lloyd George, "No men more ignorant of naval affairs were ever associated together than the Prime Minister and Geddes". Convoying was turning the tide. Geddes appointed the Belfast shipbuilder
Lord Pirrie as controller-general of merchant shipbuilding, It was a great Allied victory. Lloyd George's evaluation was that Geddes was "... one of the most remarkable men which the State called to its aid ..." He left the Admiralty in January 1919 and was made a
Knight Grand Cross of the Order of the Bath. Lloyd George then asked him to organise a new Ministry of Transport. Until the bill setting up this new office was passed in May 1919, Geddes remained in the cabinet as
minister without portfolio. In May 1919, he was appointed the first
Minister of Transport. The new ministry was given control over railways, roads, canals and docks, but was criticised in both houses of parliament for giving in to nationalisation and for its large size. In the autumn of 1921, the handing back of the railways to the companies after state control was being reviewed, which put the Ministry of Transport under further pressure. Geddes had neither taste nor aptitude for political infighting, and resigned in November 1921. ==Austerity programme==