Yes, the goverment 5 a day message does say that you can only count juice as 1 of your 5 a day but it has been hijacked by food manufacturers and they apply their own standards to it. How many average people are going to look at all the finer points of the campaign and how many are going to just pay attention to the big label that tells them that something is healthy?
It's good that people are encouraged to eat more fruit and vegetables, but there is a huge element of willingly allowing ourselves to be deceived by it. When there are products like fruit loaf, pizza or a sausage & chips in onion gravy ready meal proudly claiming that they "contain 1 of your 5 a day" then something has gone wrong! Fine to eat those things just because you fancy them, but don't pretend you do it because they are "healthy"!
I just had a look on a few supermarket websites about how much fruit/veg makes up 1 of 5 a day and the standard line is "80g of fruit or vegetables is one portion and contributes to one of your five a day"
but the lawyer in me is asking why they have worded it as "contributes to one of your five a day" - probably because the product contains 80g of overprocessed, sugary, salty, pureed pulp that used to be a vegetable in a former life, and that doesn't really count as one portion the way the original campaign intended it!