Just now I decided to walk over to the Arts canteen.... simply
put, I was getting bored of the food at Engin....
I went to the western stall, and ordered pan-fried salmon. The
signboard showed this:

What I got was this:

Two ultra-small, ultra-thin fillets of salmon. With a miniscule
amount of fries.
The Western stall at Engin is so much better.
I'm not eating at Arts again. EVER. 

does this help?
Sale of Good Act
Chapter 14. (2A) For the purposes of this Act, goods are
of satisfactory quality if they meet the standard that a reasonable
person would regard as satisfactory, taking account of any
description of the goods, the price (if relevant) and all the other
relevant circumstances.