Prime Minister Tun Dr Mahathir Mohamad officiates the opening ceremony of Tenaga Nasional Berhad’s Balai Islam Complex in Kuala Lumpur January 16, 2020. — Picture by Yusof Mat Isa

KUALA LUMPUR, Jan 16 — Tun Dr Mahathir Mohamad today hailed Tenaga Nasional Berhad (TNB) as a success story of the government privatisation programme and said the power giant has won accolades for its achievements because it made changes boldly, sometimes even going against the grain.