When Plane Food also got a 2 I thought they may have been something with the T5 infrastructure that made it hard to comply with the guidelines.
So I looked at the T5 Wetherspoons and they got a perfect 5, crap food, but it won't make you ill:
http://ratings.food.gov.uk/business/en-GB/519359
This is really disappointing. I personally thought anywhere with modern facilities shouldn't get less than a 4.