The gap year is now firmly established as a rite of passage for Britain's younger generation: even Harry and Wills have had a go. The UK's gap year industry is now worth a staggering ?2.2billlion, and it's growing rapidly. But as more and more travel companies move to cash in on this lucrative market, there are fears that both the volunteers and their hosts are being exploited by unscrupulous operators, prompting increasingly strident calls for greater regulation and transparency.
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