Property entrepreneur Nick Leslau digs deep into his pockets next week when he makes a generous cash donation to severely disabled people in Glasgow, as part of Channel 4's The Secret Millionaire. Channel 4 says it is the biggest donation yet made on the show, in its third series.

The programme features seven individuals who conceal their true identity and assume a new one in order to seek out volunteers in need of their help and cash. Mr Leslau, worth an estimated £200 million, according to the Sunday Times Rich List, is the wealthiest participant of the series. "It opened my eyes to some appalling deprivation on our doorstep," he tells People. "Poverty, violence, drugs, alcohol and unemployment fuel a desperate downward spiral, which was the backdrop for my encounter with the disabled and those who have fallen through the so-called ‘safety net' of society.

"I was embarrassed to have to admit to and confront my own personal fears of those with mental or physical impediments, but cherished the time I was able to spend with so many people, who showed me that beneath the disabilities are some of the kindest and most loving people around. The volunteers who help look after these people are society's real heroes.

"I have never had so much fun and pure joy giving away money in my life."

Mr Leslau is the chairman of Prestbury Investment Holdings.

Mr Leslau is on Channel 4's The Secret Millionaire on Tuesday August 19 at 9pm