Watch this surprisingly sweet Rugby World Cup ad

When the World Cup rolls round, you can be sure that companies are going to jump on the bandwagon and attach their names to it.

In the past, this has led to some truly dreadful and forgettable ads, but this year's World Cup has inspired a slew of instant classics. With heist videos and rugby crash-courses, advertisers are really outdoing themselves. But O2 have come up with the most surprisingly sweet video so far, where the English fans' support for their team literally turns the players into giants. It's like the BFG meets the Iron Giant... https://www.youtube.com/watch?v=zXppMqUVMYE