John Treharne's no-frills approach to financial fitness

After seeing the success of budget gyms in America and Germany, John Treharne brought the idea to Britain, where it's proved just as popular.

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John Treharne brought the budget-gym concept to Britain

Business gurus often urge budding entrepreneurs to 'follow their passion'. It's a nice soundbite, but it's not enough in itself, says John Treharne, 59. The reality is that "you need to have a solid business plan".

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Dr Matthew Partridge
Shares editor, MoneyWeek

Matthew graduated from the University of Durham in 2004; he then gained an MSc, followed by a PhD at the London School of Economics.

He has previously written for a wide range of publications, including the Guardian and the Economist, and also helped to run a newsletter on terrorism. He has spent time at Lehman Brothers, Citigroup and the consultancy Lombard Street Research.

Matthew is the author of Superinvestors: Lessons from the greatest investors in history, published by Harriman House, which has been translated into several languages. His second book, Investing Explained: The Accessible Guide to Building an Investment Portfolio, is published by Kogan Page.

As senior writer, he writes the shares and politics & economics pages, as well as weekly Blowing It and Great Frauds in History columns He also writes a fortnightly reviews page and trading tips, as well as regular cover stories and multi-page investment focus features.

Follow Matthew on Twitter: @DrMatthewPartri