Mark Logan had almost 700 secret recordings of colleagues on the loo

The disgraced former financial chief of Scotland’s biggest social landlord used hidden cameras to film colleagues on the toilet.

Mark Logan, who was the finance director of the Wheatley Group, also filmed people while they were away on business trips.

The 48-year-old also sexually assaulted someone while they were asleep.

Logan, of Tweedsmuir Crescent in Bearsden, made almost 700 recordings of colleagues over a 12 month period.

At Glasgow Sheriff Court this week, he pleaded guilty to charges of voyeurism and sexual assault.

The procurator fiscal depute told how several female colleagues said they were "uncomfortable" using the a toilet at the Wheatley Group's head offices on Glasgow's Cochrane Street and mentioned the presence of "strange devices" to their bosses.

Wheatley bosses investigated and uncovered three digital clocks which were found to have recording equipment inside them.

The fiscal depute told the court: "The clocks were removed and they were locked in.

"[Logan] was frantically searching cupboards near the toilet and asked for the whereabouts of the clocks."

When confronted, the court heard that Logan said: "It's me. I am ashamed.

"I've been bottling it up for 20 years and I don't want to be gay. At best I'm bisexual."

A total of 685 videos recovered from five devices, including hard drives and "battery operated clocks with a covert camera which filmed through the mirrored face."

Of these videos, 341 were found to have been filmed in the office toilet and three people were filmed using the facility.

The court heard that Logan "can be seen in the films pointing a remote control at the device."

Between May 2015 and 2016, along with filming in his workplace, Logan also made secret recordings while on business trips to Edinburgh's George Hotel and in London.

On one occasion he placed a device on the bedside table of one of his victims.

In one video, one of the subjects he filmed was seen wearing a suit and tie.

The court was told four videos were recovered of Logan performing a sexual act with "a similar tie".

Logan also pleaded guilty to sexual assaulting someone by rubbing them in a sexual manner while they were asleep in 2014.

His solicitor Neil Kilcoyne said added that a psychological report would be submitted before the sentencing next month.

Sheriff Joseph Platt said he would defer sentencing to await criminal justice and social work reports.

Logan, a chartered accountant, became Wheatley Group’s finance director in 2012.

He joined Glasgow Housing Association in October 2009 from West of Scotland Housing Association, initially as director of corporate services, before becoming deputy chief executive.

Logan has been placed on the sex offenders register.