Looks to me like Mr Nolan's director career is on the same track as Mr Night's (shamaya, Shimalaya, whatever). Their first or second movies (Memento, superb) were by far their best and it's all downhill from there (Interstellar, yuk).

Dunkirk kind of lets you down on all accounts. No attention paid to the anachronisms (modern buildings, container cranes... lol). No characters whatsoever, except as solid as usual Mark Rylance. The storyline would fill half a page on a notepad. Seeing each scene from three different perspectives at different times does not make the film any better, just the story shorter. No suspense, no action, no acting, no nothing.

Photography is decent, but it's not Private Ryan or Band of brothers.

Honestly don't bother, watch it on freeview in 2 years you'll be equally disappointed.