In November 2003, Pauline Dunnery (40) was working on a ward when she was attacked by serial sex offender William Kerr.

The 34-year-old was later jailed for life after admitting an assault with sexual intent.

The hospital authorities, with help from Tayside Police, launched a full review of security arrangements, changing many prodedures within hours of the attack.

Extra patrols of the grounds were launched, while staff and patients were given special escorts by porters.

Some staff were counselled and others were offerred personal alarms.

The latest move is an upgrade and extension of the hospital’s security camera system, which now ensures PRI is covered internally and externally by 35 high-resolution cameras with night-vision.

Including an additional nine cameras, the system can record and play back events at a quality that is acceptable for criminal prosection — and has already been used in connection with crime committed at the hospital.

Norman Sutherland, site manager, said, “This has significantly enhanced security on the site.

“The new system allows real time recording to continue whilst viewing past footage. It is a much more comprehensive, clearer facility with full colour.”

Donald Campbell, Tayside Police’s crime prevention and architectural liaison officer, said, ”We are pleased that PRI have recently upgraded their CCTV system and welcome their pro-active approach to crime reduction and general site security.

“Everyone benefits from CCTV technology and a system covering such a large campus as PRI will not only prevent crime but more importantly reduces the fear of crime for patients, staff and visitors to this site.

“PRI is like a small town with hundreds of people working there, visiting or receiving care. Add on the fact there are public roads, a bus service and large car parks throughout the site means it must maintain a high level of security to protect all who use it.”