Camden, North London. It’s 12.45pm on a Saturday, and the punks, tattoo artists and tourists are gearing up for another day of drinking and shopping in the area’s famous tunnels, warehouses and bridges. But the offices at the Iceworks building, overlooking the canal, are filled with smart young professionals. It might be the weekend for the rest of us, but this is their equivalent of Monday morning, the busiest day of the week, and the opening bell on their market is about to ring. They have a huge sum of money on the line because they are in charge of the biggest gambling syndicate in Britain, believed to make up to £100 million in a good year. A mixture of men and women — mainly men — aged from 25 to 45 gather around the TV screens dotted around the Camden office, some mounted on walls and others at desks. All are tuned to the weekend’s football. The first Premier League match of the weekend is about to begin. And with it, a weekly multi-million-pound gambling bonanza kicks off too. Their company can have £1 million riding on the outcome of a single match, and multiple more on the nine…