John Caudwell

The British billionaire is behind Audley Square in Mayfair, a residential development to feature penthouses with eight bedrooms.

The 66-year old, who lives in Mayfair, sold Phones4U for £1.24 billion. He is now estimated to be worth £1.576 billion.

Caudwell set up the national charity Caudwell Children, which organises the annual Butterfly Ball and Float Like a Butterfly Ball.

He was also one of the first Britons to sign up for Bill Gates and Warren Buffer’s Giving Pledge, calling on billionaires to commit at least half their wealth to charity during their lifetime.

Sri Prakash Lohia 

Lohia is known affectionately as the “Maharajah of Mayfair” as he has spent around £50 million on renovating a Georgian mansion in Mayfair.

India-born Lohia moved to Indonesia in the early 1970s and it was there that he and his father started a yarnspinning company.

He is now the co-founder and chairman of Indorama Corporation, a diversified petrochemical and textile company, with his worth valuing at around £5.402 billion.

Known for his philanthropy, he donates to the construction of hospitals and medical centres, as well as sanitation infrastructure. Lohia is also looking into how to make his business practices more eco-friendly with processing and recycling.

Anil Agarwal 

India-born Agarwal decided to join his father’s business making aluminium conductors instead of going to university.

Today he controls Vedanta Resources through Volcan Investments, a holding vehicle with a 100 per cent stake in the business.

Alongside another couple of companies, which Argawal has a stake in, he is worth around £10.57 billion.

Agarwal created the Vedanta Foundation in 1992, building hospitals, schools and infrastructure, conserving the environment and funding community programmes that improve the lives of millions.

Inspired by Bill Gates, Agarwal, who has a Mayfair home, has also pledged to donate 75 per cent of his family’s wealth to charity.

Tessy Antony de Nassau

P.N.C. Menon

The Omani billionaire, who was born in India, is the founder and chairman of Sobha Ltd.

After dropping out of college, he left India for Oman to develop his interior decorating business, and he named his company Sobha after his wife.

Sobha, which recently unveiled its global HQ in Mayfair, is an Indian multinational real estate developer for both residential and contractual projects.

In 1994, a year before he started Sobha Ltd, Menon established the Sri Kurumbu Educational and Charitable Trust, in which he adopted two villages in his native Kerala.

In the villages, he helps families with low incomes and provides education to children from 2,500 poor families. Menon and his wife are also part of the Giving Pledge.

David & Simon Reuben

The Reuben Brothers came to Britain in the 1950s, originally making money from carpets, property and metal, including the Russian aluminium industry.

Today they are leaders in private equity, real estate investment and development, and debt financing. They are currently estimated to be worth around £18.664 billion.

David (80) and Simon’s (77) real estate holdings include Mayfair’s £300 million Burlington Arcade and a £132 million block in Piccadilly.

Their philanthropic arm, the Reuben Foundation, was founded in 2002 with the aim of making essential contributions to the advancement of healthcare and education around the world.

Mona Khashoggi

Saudi-born Mona’s love of art started at a young age with her parents who had 16th and 17th century antique furniture.

Today, the art collector has co-founded the Mansoojat Foundation, a UK charity founded to revive and preserve the traditional ethnic designs and costumes of the Kingdom of Saudi Arabia.

A prominent patron of the arts, Mona sponsors young Arab artists, and has served as the Middle East Ambassador to London’s Art14 Fair and Photo London.

She was also part of the events committee of the English National Ballet, Save the Children, Barakat Trust, MAP (Medical Aid for Palestine) and the Al Madad Foundation.