Head of the UK"s Internet Watch Foundation, David Kerr, is to stand down as chief executive after five years in the job.
The IWF is the UK"s only internet pornography watchdog and has played an important role in many of the police investigations into online porn rings, including the recent Operation Landmark, the biggest online raid to date, which resulted in 130 arrests across the globe.
Kerr will leave in March in order to spend more time with his family.
"It is a pretty intensive job and I feel that five years is long enough," he explains.