My sister bought some from Asda yesterday and her son ate quite a few and then said "Mum I'm all itchy!" and she looked and found his neck and face was covered in a red rash. No previous history of strawberry sensitivity and he's 10 years old.
Later, her adult DD ate some and immediately had the same reaction...this DD also has no history of allergies at all.
My sister had washed them under running water...she washes all fruit well...she won't be buying them anymore and I certainly won't either!
I assume they must be covered in pesticides!