Some UK suppliers break down pro packs and sell films individually. I've got a lot of 800Z like this and it's in date but I don't know when it expires. I wrote to Fuji UK asking them if they could date the film by the small serial number printed right next to the film gate and they told me no. All they could give me was two dates of the two batches they'd imported. I think stuff like package design and leader condition is only relevant for quite old film, not stuff that's either in-date or just out of date.