A tech founder who sold his first startup for £40 million shares his advice for budding entrepreneurs

LONDON - Alistair Crane sold his first business, mobile apps agency Grapple, for close to £40 million aged just 27.

Now, three years later and after a stint in San Francisco, he's heading up a new venture, retail technology company Hero, and hoping it will be equally successful.

Business Insider caught up with Crane and Hero's founder Adam Levene, an early employee at Grapple, to get their advice for first-time founders looking to build a business.

Here are their four biggest tips: