At what percentage of the final product will an ingredient have to be declared? I have in my head 2% but I'm not certain on that.
One of our products contains yeast extract which is less than 1% of the final product - would this have to be declared?
I'm not aware of a general threshold below which an ingredient doesn't need to be declared for labelling in the UK/EU - consider e.g. flavours used at 0.1%, additives used at <0.1% etc.
Is it possible that you're confusing this with the 2% threshold below which ingredients no longer need to be ordered in descending weight? (Point 6 of Part A of Annex VII of Regulation (EU) 1169/2011)
Or possibly the 2% threshold below which the constituent parts of compound ingredients do not require separate declaration, as defined under Point 2 of Part C of the same annex?
Unless someone else has a reference with something I'm not familiar with, you'd definitely need to declare the yeast extract unless it's present as part of a composite ingredient subject to one of the exemptions in Part C of the annex noted above.