The Patel brothers are the founders of pharmeceuticals company Waymade PLC.
Their wealth grew by £100 million in the last year.
=15. Surinder Arora — £800 million.
60-year-old Surinder Aror is founder and chairman of the Arora Group, and has made his fortune through hotels.
Having arrived in the UK as a teenager from India, Surinder founded the business in 1999, running a luxurious four-star hotel at Heathrow for airline staff.
He even purchased the Renaissance London Heathrow hotel in 2012, where he had worked as a waiter in the 1970s.
Today, the group owns a number of property, construction, and hotel companies, including the InterContinental London at The O2 and the World Business Centre at Heathrow.
Arora's valuation nearly doubled in the past year from £450 million.
=15. Lord Paul (and family) — £800 million.
48-year-old Swraj Paul is founder of the Caparo Group, one of the UK's largest steel businesses.
He became a member of the House of Lords in 1996, and is therefore known as Lord Paul.
Despite the fact that 16 of the group's companies went into administration in 2015, according to The Birmingham Post, the wealth of Lord Paul's family went up by £300 million in the year to 2017, thought it remained flat in the past year.
14. Muhmud Kamani (and family) —£875 million.
54-year-old joint CEO of fashion retailer Boohoo.com Muhmud Kamani saw the value of his family's empire grow by £75 million in the past year.
13. Zameer Choudrey — £985 million.
60-year-old Bestway Group conglomerate CEO Zameer Choudrey saw his wealth increase by £75 million over the past year.
In 2016, he was awarded a CBE (Commander of the British Empire) awared by the Queen.
89-year-old Kenyan businessman Manilal Premchand Chandaria is of Indian descent, but was born in Nairobi.
He is the CEO of the Comcraft Group of Companies, a billion dollar enterprise that has a presence in over 40 countries, is on the boards of several prominent East African companies, and was awarded theOBE (Order of the British Empire) by the Queen in 2003.
11. Harpal, Raj, and Tony Matharu (and family) — £1.2 billion.
One of London’s largest privately-held luxury hotel empires, Global Grange Limited, is headed up by the Matharu brothers, Harpal, Raj, and Tony.
The brothers saw their fortune grow from £845 million to £1.2 billion in the past year.
=9. Zuber & Mohsin Issa — £1.3 billion.
Ranked in 34th place last year, the valuation of brothers Zuber & Mohsin Issa has risen by a whopping £1 billion in just one year.
They are the owners of Lancashire-based petrol company Euro Garages Limited, which has gone from a "slightly worn petrol station" in 2001 to one of Europe's leading companies in the sector as part of the EG Group.
=9. Rajesh Satiija Ram — £1.3 billion.
Indian-born Rajesh Ram Satiija made his fortune in Africa, and is one of the continent's most enterprising business figures.
With a reputation as "Mr Lucky," he pushed up his net worth with investments in the mining and agriculture industries. His Sun and Sand Group spans three continents and his valuation rose from £910 million in 2017 to £1.3 billion this year, one of the biggest jumps on the list.
He has a home in Mayfair and is now looking at a public flotation for his fast expanding group, where revenues have tripled over the last few years.
8. Jasminder Singh — £1.5 billion.
67-year-old Jasminder Singh OBE, a British Sikh, is the chairman and CEO of Edwardian Hotels.
He owns 14 luxury hotels in central London under the Radisson Blu Edwardian brand, as well as The May Fair Hotel.