Lewis Hamilton may not yet be heading the 2014 F1 world championship standings, but he is comfortably at the head of the field elsewhere.

The Mercedes driver, who is currently on a run of three straight race wins as he attempts to close the points gap between himself and team-mate Nico Rosberg, has been named as Britain's richest sporting figure in the latest calculation by The Sunday Times Rich List.

The 2008 world champion is estimated to be worth a staggering ?68m, putting himself ahead of other millionaire stars such as Manchester United's Wayne Rooney, Wimbledon champion Andy Murray, British basketball players starring in America's NBA and a host of golfers.

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Hamilton will be officially named as Britain's wealthiest sportsman by the definitive guide to wealth in Britain and Ireland next month, which is based on identifiable wealth, including land, property, other assets such as art and racehorses, or significant shares in publicly quoted companies. It excludes bank accounts, to which the paper has no access.

Hamilton will be joined at the top of the table by former McLaren team-mate and 2009 world champion Jenson Button, who it is reckoned to be worth ?63m. Both drivers are believed to have increased their wealth substantially in the past twelve months, with Hamilton ?8m better off and Button up by ?5m.

Having recently signed a lucrative new contract, Rooney will be revealed as the richest player in the English Premier League, now worth ?60m - up from ?51m a year ago - thanks to his football earnings on and off the pitch.

By contrast, The 2013 Wimbledon champion Murray added ?8m to his fortune, but is worth 'only' ?40m, putting him just sixth in the overall list behind basketball's Steve Nash (?56m) and Rooney's Manchester United team-mate Rio Ferdinand (?44m).

Without an F1 driver, Ireland's richest sportsman is currently golfer Padraig Harrington but, at ?36m, he trails another group of footballers - including temporary Manchester United manager Ryan Giggs - and basketball's Luol Deng in the list.

Britain's richest sportsmen - top 10: Source: The Sunday Times Rich List 2014

1. Lewis Hamilton Motor racing ?68m (2013: ?60m)
2. Jenson Button Motor racing ?63m (?58m)
3. Wayne Rooney Football ?60m (?51m)
4. Steve Nash Basketball ?56m (?53m)
5. Rio Ferdinand Football ?44m (?42m)
6. Andy Murray Tennis ?40m (?32m)
7. Steven Gerrard Football ?37m (?33m)
= Frank Lampard Football ?37m (?34m)
9. Luol Deng Basketball ?36m (?28m)
= Ryan Giggs Football ?36m (?34m)