A British expat will attempt a solo swim around Hong Kong Island to raise HK$1 million (US$128,168) for charity – so underprivileged kids and domestic workers can be taught how to swim, for free.

Simon Holliday, a 39-year-old Briton who has lived in Hong Kong for four years, is aiming to swim for 15 to 18 hours to complete the 45km marathon non-stop and without any assistance, Apple Daily reported.

Holliday will start at 3am on November 11 at Sai Wan Swimming Shed near Kennedy Town, then head to Victoria Harbour, Shek O, Ap Lei Chau before getting back to Kennedy Town.

Supporters will take two boats to escort him all the way and provide a chocolate bar every hour, Headline Daily reported.

Holliday hopes the swim can raise HK$1 million (US$128,168) to provide free swimming lessons for 5,000 underprivileged children, domestic workers and refugee children in Hong Kong.

At the time of going to press, over two-thirds of that amount had been pledged.