The detective, my 13 mth ds is allergic to dairy and I'm so jealous of people who can take their children out for meals and dont have to worry about it.
Now ds is properly off purees, what I generally do it take a few bits with me, e.g cucumber sticks, hummus, breadsticks, cold sausage etc that could pass as a lunch but supplement it with bits I get whilst out. Eg salad, the odd chip, carrot stick etc.
If anyone complained, I would say that the choices for ds were pretty slim pickings! A dry jacket is not appetising!
I find it easier to find bits from a hot meal selection than cold. Sandwiches are always going to be out!
However, in John Lewis at the wkd, the list all ingredients in every single baby/child's hot meal and ds could literally have had any meal, none had milk in. He ended up with roast herby chicken, chips and peas. He loved it!
I also go to new places with a packed lunch for ds but inquire as to possibilities for ds in the future. Ikea were very helpful in this! It means I can build a list of places I can take ds to and not need to take food but also know where I need to take food (sainsburys!)