These seem to be the new thing in the US. Not sure if you guys have them in the UK.
They all sell burritos that are as my big as my head (seriously, these things are HUGE), they make it in front of you ala Subway.
Which one is your favorite? Mine is Chipotle. It is always hot and makes my mouth feel like it is on fire but it is sooooo yummy. I am not wasting my money at the other 2 places again.