The only thing I’ve just thought about that might explain why they’ve implemented the policy was; are the food items pre-made as opposed to Aramark making them to order like I thought they did?
If Aramark don’t make things to order, maybe they’re worried about leftover “residue” from an allergen leaking into someone’s food even if they take the allergen out. Some people’s allergies are severe enough that even the slightest trace of an allergen can set them off.
I’m not saying that makes it justifiable, but it would be a plausible reason for the policy’s implementation if Aramark pre-assembles the food rather than making it to order.
Although that wouldn’t explain why they’ve only just implemented the policy… and if the food is made to order, then I go back to struggling to see the reason for this policy.
Aramark are using a similar model to how McDonald's and co used to operate before easier custom ordering through touch screens. Every menu item is preprepared, cooked and kept in a hot hold, until it's either sold or no longer safe to consume. They don't make food to order. The upshot of this method is that you can shift a lot of volume rather quickly, the downside is that you can't really cater to allergens.
The caveat, of course, is that McDonald's and co always used to allow you to remove ingredients from their menu items when placing your order with the cashier. They would prepare your food separately, you'd have to wait a little longer, but it was made to order.
I would expect, in this case, that Aramark are attempting to avoid any contention or potential suit incase something went wrong in the ordering process.
"Excuse me, I'm lactose intolerant, I can't have cheese. I asked you to take it off my order for the Bacon Double Cheeseburger."
"No you didn't."
"Yes I did."
"That's not what I have here..."
They could alter their touch screens, to allow the removal of items, but then this would cock up their preprepared kitchen system.
All of their actions scream, that for one reason or another, Aramark aren't comfortable with safely being able to prepare/customise food in an allergen safe way at the Merlin attractions. They need to take a serious look into how they handle their operations in these outlets, it's really not going to work out in the long run for the customers.
As always though, I encourage anyone who is experiencing issues and problems with the Aramark service to write down their complaints in a constructive manner and feed them back to Merlin / the parks. They can't hold Aramark accountable with hearsay and angry internet comments from forums, Facebook, X, or TripAdvisor reviews.