Are you a fast food junkie?

You may have pat yourself on the back for snubbing the hypnotic appeal of pie and chips at lunch in favour of a healthy sandwich. But you may be a little premature in congratulating yourself just yet.

Research by consumer watchdog Which? has revealed that a Subway 6" sandwich could contain as much salt as 10 bags of crisps. Other pre-packaged butties could be more sinful than you dream too, accounting for up to 75% of your saturated fat recommended daily intake.

But how clued up are you on the truth behind those tasty fast food delights? Take this fun quiz to test your knowledge of takeaway trivia!