From another Mumsnet thread:
Green and Blacks 70% Dark Chocolate labelling now states it contains milk due to possible cross contamination - the site states on occasions this may exceed 5 ppm which some allergy specialists say can cause a reaction. Nothing has changed either in the recipe or the cleaning - this is just a labelling change.
However - this is a recipe change which I found mentioned on allergycooksforum www.allergycooksforum.co.uk/viewtopic.php?t=75
Alpro/Provamel desserts now contain wheat starch.
The thickener has been changed from tapioca to wheatstarch. Full ingredients here:
www.provamel.co.uk/Eng_ENG/getpage.asp?i=10