Every week a new supplier arrives and wants to crack London with his extraordinary products, in the hope of taking a bite out of this lucrative high-end business. 

But the luxury food market is a highly-pressured place to do business. Just like the chocolate guy says, "It is a bit polarizing if you can buy bars of chocolate that cost 4 pounds why would you pay so much more. If I didn't know more about my chocolate I would also have the same reaction. I would probably be on the side of people that think it's ridiculous. "

But once you've found a niche, keeping ahead of the competition, and maintaining the standard that your high-end clients expect, is the key to success.