Tony Buckingham
Oil, Diamonds
Rank 2017

Jersey-based entrepreneur Buckingham is a former member of the Special Boat Service and North Sea diver who is also well known in yachting circles for his vessel Easy Oars, which has competed in the Admiral's Cup. He has a stake in oil explorer Heritage Oil, which after a £924m takeover in 2014 was worth £314m but he only pocketed £130m, retaining a 20% share. The operation is in a strong position and with other assets we pin Buckingham, 65, at £425m.