HP5+, APX 400 new, Silvermax.
On a week long business trip I took two rolls of film with me. HP5+ and Adox Silvermax, both coming from bulk rolls. Unfortunately, and without noticing, I made the mistake and took a short 24 exp roll of HP5 with me. Shooting in the afternoon in heavy overcast E.I. 400 weather I was snapshotting along and hit the end of the roll.
Luckily there is a Müller drugstore in town (as it is in most towns of reasonable size), which is selling APX 400 new. At €4.99 it was more expensive than a regular roll of HP5 at my normal sources, but when you quickly need a roll of film is the perfect resource. The day was saved!