In the case of a determinatesentence, a prisoner is generally entitled to be released from prison on licence having served a specified percentage of his sentence.
Because a determinate prisoner is released at the half way point in his sentence, a life sentence with a minimum term is the equivalent of a determinatesentence of double that length.
Shahjahan, now 29, was given a new determinatesentence of 17 years and eight months and he must serve half of that before he is eligible for release on licence.