History of South Africa (1910–48) Good Hope. Smuts took severe action against the pro-Nazi South Africa Ossewabrandwag movement (they were caught committing acts of sabotage) and jailed its leaders for the duration of the war. (One of them, John Vorster, was to become future Prime Minister of South Africa.) (See Jan Smuts during World War II.) Prime Minister Jan Smuts was the only important non-British general whose advice was constantly sought by Britain's wartime Prime Minister Winston Churchill. Smuts was invited to the Imperial War Cabinet in 1939 as the most senior South African in favour of war. On 28 May 1941, Smuts was appointed
Minister for the Cabinet Office and as First Secretary of State, he was considered a de facto Deputy Prime Minister. Upon the appointment of David Lidington in 2018, Lidington retained the responsibilities Green had held, but the title of First Secretary of State remained vacant (as did the office of Deputy Prime Minister, vacant since 2015). The office in its present form therefore appears to have the responsibilities of a de facto Deputy Prime Minister, without either of the associated titles usually granted to individuals in the British Government (First Secretary of State or Deputy Prime Minister). The current Minister is David Lidington, who was