One of the seven men arrested this week after allegations of historical sexual offending at Dilworth School is still a registered teacher

Seven men have been charged this week, after a year-long investigation.

One of them still holds a valid teaching certificate, but it's unclear if he's still working.

Today's Herald reveals the alleged offending, which spanned more than three decades, continued right up until 2008 and wasn't confined to Auckland.

All the men are due to reappear in court next month.