In terms of the Forbes List, it's laughable, it has at Number One, the Number Ninth in the Sunday Times List.
Why is the Forbes/UBS list different, basically because it's a joke, with most of the best known and famous Billionaires residing in London such as Roman Abramovich owner of Chelsea Football Club and Alisher Usmano who has a major share in Arsenal football club and who also resides in London are left off the list entirely, as are Lakshmi Mittal and family who live on Kensington Palace Garden in London.
Furthermore London and indeed the UK would further it's lead of billionaires if people such as members of the Saudi Royal Family including Princess Al Jawhara bint Ibrahim Al Ibrahim, widow of Saudi Arabia's late King Fah were included or the Aga Khan, Sultan of Brunei, His Highness Sheikh Mohammed bin Rashid Al Maktoum, Sheikh Mohammed, the Jordanian Royals, the Qatar Royals, even the Nigerian Royals etc were all included, many of whom reside in London and the UK, and indeed own major horse racing stables in places such as Newmarket and lots of real estate in the UK. They are still Billionaires, they are just not counted in rich lists such as Forbes or indeed The Sunday Times.
Forbes List UK (Top 27)
Forbes List: the UK
1. Gerald Cavendish Grosvenor (The Duke of Westminster) and family - £6.954bn
2. David and Simon Reuben - £6.405bn
3. Hinduja Brothers - £5.063bn
4. Charles Cadogan and family - £3.355bn
5. Philip Green and family - £3.050bn
6. Richard Branson - £2.806bn
7. James Dyson - £2.684bn
8. Laurence Graff - £2.684bn
9. Anthony Bamford - £2.562 bn
10. Joe Lewis - £2.562bn
11. Bruno Schroder - £2.501bn
12. Bernard Ecclestone and family - £2.135bn
13. Mike Ashley - £2.074bn
14. Ian and Richard Livingstone - £1.952bn
15. David and Frederick Barclay - £1.830bn
16. Eddie and Sol Zakay - £1.708bn
17. Farhad Moshiri - £1.586bn
18. John Caudwell - £1.525bn
19. John Whittaker - £1.464bn
20. Clive Calder - £1.403bn
21. Peter Hargreaves - £1.342bn
22. Nadhmi Auchi - £1.281bn
23. Alex Beard - £1.281bn
24. Mark Coombs - £1.159bn
25. Ayman Asfari - £1.159bn
26. Richard Desmond - £1.159bn
27. Charles Dunstone - £1.098bn
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Top 25 Sunday Times Rich List 2014
BBC News - 'Rich List' counts more than 100 UK billionaires
1. Sri and Gopi Hinduja, £11.9bn
2. Alisher Usmanov, £10.65bn
3. Lakshmi Mittal and family, £10.25bn
4. Len Blavatnik, £10bn
5. Ernesto and Kirsty Bertarelli, £9.75bn
6. John Fredriksen and family, £9.25bn
7. David and Simon Reuben, £9bn
8. Kirsten and Jorn Rausing, £8.8bn
9. Roman Abramovich, £8.52bn
10. The Duke of Westminster, £8.5bn
11. Galen, Hilary and George Weston and family, £7.3bn
12. Charlene de Carvalho-Heineken and Michel de Carvalho, £6.36bn
13. Mohamed Bin Issa Al Jaber and family, £6.16bn
14. Carrie and Francois Perrodo and family, £6.14bn, new
15. German Khan, £6.08bn, new
16. Sir David and Sir Frederick Barclay, £6bn
17. Hans Rausing and family £5.9bn
18. Nicky Oppenheimer and family, £4.57bn
19. Earl Cadogan and family, £4.2bn
20. Joseph Lau and family, £4.03bn
21. Sir Philip and Lady Green £3.88bn
22. Denis O'Brien, £3.85bn
23. Mike Ashley, £3.75bn
24. Sir Richard Branson and family, £3.6bn
25. Idan Ofer, £3.43bn, new
The full Sunday Times Rich List 2014 is published on Sunday 18th May 2014.