Prime Minister Najib Abdul Razak and his nemesis Dr Mahathir Mohamad have seldom let an opportunity slip to take potshots at one another.

This morning was no different when Najib addressed a group of retired police officers at the Putra World Trade Centre in Kuala Lumpur.

“Old is gold,” said the prime minister in his speech, adding that he was also reminded of another saying that “age does not matter as long as what matters does not age”...