The perverted spy doctor who filmed more than 1,000 patients, staff, and visitors using hospital toilets, and labelled the sick videos with titles such as 'Exeter 10/3 mum-young blonde' and 'teenager bum', will receive a 'significant and substantial' sentence.

VIDEO: Hidden toilet cam doctor filmed himself by mistake - jailed for five years today

Dr Lam Hoe Yeoh, 62, who until his fall from grace had been one of the one of the country's leading ear doctors, admitted using his position to plant cameras and film people using the toilets at the Epsom and St Helier Hospital, St Antony's in Cheam, and a clinic in Thames Ditton.

He also filmed men, women, and children in other unidentified clinics including one in Nottingham.

He admitted to masturbating over some of the videos.

The court heard at least one film on his computer showed a woman changing her sanitary towel.

Horrified former friends and colleagues packed the public gallery of Croydon Crown Court on Tuesday, November 25, to hear the doctor admit his twisted behaviour, including hiding cameras in his watch, pens, and lining of bins, to capture lewd footage that he would use to make mini-home movies.

The court also heard Yeoh was a compulsive collector with an obsession for children's books and had built a huge collection of Enid Blyton novels.

He pleaded guilty to seven counts of voyeurism as well as six counts of making indecent images of a child, and one count of possessing extreme pornography.

The court heard that he also filmed guests who visited his home in Garratts Lane, Banstead, and put covert cameras in train toilets while, in a handful of cases, Yeoh filmed mothers using the toilet and later their children.

He was only found out when one of his cameras fell from a toilet wall in the St Anthony's Hospital in Cheam prompting officers to search his home, offices, cars and computers.

They found multiple recording devices and hours of stored footage filed with specific titles depending on the content.

The disgraced father-of-three, whose two daughters and one son are all in the 20s,  was also charged for having extreme pornography which showed humans carrying out sex acts on dogs.

After his arrest Sutton police said he had more than 1,084 unidentified victims.

His wife Ivy Muihong Sng, 57, faced a single charge of voyeurism relating to footage filmed in their home, but the prosecution opted not to pursue the charge.

Peter Clements, prosecuting, said one child was now scared of seeing Yeoh in the street and feared he was hiding in the cupboards, filming her at her new home.

Other former friends and colleagues have had counselling since the voyeurism surfaced, reporting they find it more difficult to trust other staff, and fear they are being filmed whenever they use the toilet.

Ms Susan O'Neill, mitigating, said Yeoh told counsellors collecting the video footage felt like the one thing he could control in his life.

She said Yeoh often wondered why he took the footage, never shared it, and sometimes didn't watch it.

Ms O'Neill said: "The depth of shame for his conduct can't be put into words.

"He understands fully the betrayal of the trust of his colleagues."

Prior to handing down the sentence, Recorder Warwick McKinnon, said: "If I reached the guidelines for every 1100-odd offence, I would come to a sentence which would be quite absurd."

Malaysian-born Yeoh had 30 identified victims, 1,084 unidentified victims, six counts of making indecent images of children, and 12 charges for possessing extreme pornography.

He will be sentenced at Croydon Crown Court tomorrow morning.

The offences were committed between January 1, 2011, and April 15, 2014.

Are you one of Yeoh's victims? Call the news desk on 020 8722 6358, or email tom.gillespie@london.newsquest.co.uk