Sentence Administration Act 2003

A term does not elapse while a prisoner is at large, having escaped lawful custody while serving it.

A prisoner who is returned to lawful custody after having escaped from it while serving a fixed term, must serve —

the part of the term he or she had yet to serve at the time of escaping; plus

one‑third of the lesser of —

the period during which he or she was absent from lawful custody; or

the period beginning on the date of escape and ending on the date when, but for the escape, the fixed term would have ended,

A term does not elapse while a prisoner is not in lawful custody unless this Act or another written law provides otherwise.