Former Bega Cheese boss Maurice Van Ryn has had his sentence for child sex abuse offences almost doubled on appeal.

In September last year he was sentenced to 13 years in jail, with a non-parole period of seven years.

Today he was re-sentenced to a minimum period of 13 years and six months behind bars in the state Supreme Court’s Court of Criminal Appeal.

A transcript from the ruling described the original sentence as “manifestly inadequate”.

“The sentence is so unreasonable and plainly unjust that it amounts to an affront to the administration of criminal justice,” the transcript read.

“The Court should exercise its discretion to intervene and impose an appropriate sentence.”