The police force has announced the biggest reshuffle of its top management since 2001 following the retirement of several senior officers, including Police Commissioner Tsang Yam-pui, who ended his service yesterday. The announcement sees the promotion of two officers to senior assistant commissioner, five officers to assistant commissioner and 11 to chief superintendent. The two new senior assistant commissioners are Regional Commander of Kowloon West Mike Dowie and Richard Tang Hau-sing, who now commands the security wing. The five new assistant commissioners are Kevan Cooper, Lau Chi-keung, Henrique Koo Sii-hong, Tang Kam-moon and Au Hok-lam. Deputy Commissioner Dick Lee Ming-kwai will take up the commissioner's post today, while Senior Assistant Commissioner Tang King-shing, has been promoted to deputy commissioner. The promotions are needed to fill vacancies left by the retirement of Mr Tsang and Senior Assistant Commissioner Sidney Chau Foo-cheong, 53, next June. Assistant Commissioner Mak Man-poon, 54, will also retire next April, while Assistant Commissioner Chung Hiu-pang, 52, is believed to have sought early retirement. The death of former assistant commissioner Cheung Chi-shum, who jumped to his death last month, had thrown the reshuffle plan into disarray. It is understood he was originally offered the rank of senior assistant commissioner.