The former Cabinet minister, who has served National for 15 years, says there was a contest between diversity and experience - and in his case, diversity won.
National is putting it down to the Government wanting to reduce the prison population by 30 per cent, saying it filters through to the justice system and results in more people serving home detention for serious offences.
Operations on hold
The use of surgical mesh to treat a common childbirth injury has been suspended because of safety concerns.