These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The Portobello road sequence drags on quite a while and seems to have no greater link to the story than to display different cultures dancing. By the end of it, you might have forgotten why the heroes even stopped in.
Emelius's hazy vision of Miss Price on the railroad tracks, clad as the magician's assistant he envisioned her to be, comes out of nowhere (although a good case could be made it was a spell, whether conscious or subconscious, which she cast to summon him when she ended up in distress and couldn't call for help on the phone) and after it lets him escape the Nazis and make it back to the cottage it is never mentioned again.
Nightmare Fuel: Browne sleeping on a bench waiting for his train when he wakes up to an echo-y singing, and sees a ghosty lingerie-clad Eglantine walking on the railroad tracks before she disappears.
The simple fact that a Nazi occupation of Britain makes up much of the second half of the movie. Part of Eglantine's house is even destroyed by a grenade in the battle scene. These scenes can be nightmarish, even as Disneyfied as it was depicted.
Padding/Shoot the Money: The original cut of "Portobello Road" is a serious endurance test, regardless of how talented the performers are.