Prime Minister's Office (Sri Lanka) the Parliament. The office of prime minister was formed in 1947 with D. S. Senanayake becoming the first Prime Minister of Ceylon. It consisted of a Secretary (Permanent Secretary) and an Assistant Secretary, who were officers of the Ceylon Civil Service, and a Private Secretary, along with clerical and support staff based at the Senate Building along with the Senate, Cabinet office and the Ministry of External Affairs and Defence. Since 1960 the prime minister's office has been based at Sirimathipaya Mansion on Sir Ernest de Silva Mawatha (formerly Flower Road), Colombo which was the former residence of philanthropist Sir
Deputy Prime Minister of Singapore on 2 August 1968. Deputy Prime Minister of Singapore The Deputy Prime Minister of the Republic of Singapore is the deputy head of the government of the Republic of Singapore. The role of Deputy Prime Minister is the second highest post and senior Cabinet Minister in Singapore. The holder will sometimes assume the role of Acting Prime Minister when the PM is temporarily absent from Singapore. Since the mid-1980s, Singapore has usually had two Deputy Prime Ministers at a time. Only Ong Teng Cheong and Tony Tan (who later became Singaporean presidents) served under more than one Prime Minister during