They were secretly filmed after seeking treatment from hearing specialist Dr Lam Hoe Yeoh.

Colleagues, patients, visitors and even rail passengers were caught on concealed cameras he rigged up in lavatories, the court was told.

Consultant Yeoh, 62, targeted 1,116 people with 22 covert cameras in the biggest voyeurism case ever investigated by British police.

So far, only 32 victims have been identified and three of those are children.

One woman was filmed 300 times and the youngest victim was aged three, Croydon Crown Court in south London heard.

Yeoh was based at St Helier NHS Hospital in Carshalton, Surrey, but worked and collected his sick films at several other hospitals.

Using a range of computer devices to record and store the videos, he later made compilation films by splicing images together.

Peter Clement, prosecuting, described Yeoh’s actions as “sinister, indecent and criminal”. The doctor had never tried to share or distribute any footage but he had “grossly abused” ­people’s trust, Mr Clement said.

The Malaysian-born father-of- two installed cameras in toilets at his hospital surgeries in London – including at stars’ favourite the Portland – Exeter and Nottingham. He also filmed passengers in train lavatories and guests using the bathroom at his £750,000 home in Banstead, Surrey.

He was finally caught in April after he hid a camera in a toilet block at the private St Anthony’s Hospital in North Cheam, Surrey. After it fell to the floor a female staff member handed it to police.

It had been used to video a woman in the lavatory but had also caught Yeoh fixing the camera into position.

After his arrest, examination of computer devices revealed the huge scale of his offending.

Yeoh admitted seven charges of voyeurism between January 2011 and April this year. He also admitted six counts of making indecent images of a child and possessing extreme pornography featuring bestiality.

He was remanded in custody before sentencing today. The judge told Yeoh to expect a ­“significant” jail sentence.

His wife Ivy Yeoh, 57, had faced a single count of voyeurism but the charge was dismissed.

Yeoh built his reputation as a tinnitus expert over two decades. His sister Chee Koon Yeoh said he was now a “broken man”.

SOURCE:  EXPRESS