Now the BFI might characterise it thus …

Although recently described on Channel 4 as the "the ultimate British war film", Ice Cold in Alex (d. J. Lee Thompson, 1958) was, in fact, attempting to break the mould of the genre in several ways. First, a German is sympathetically characterised: Van der Poel (Anthony Quayle) may be arrogant, but he is also very brave. Second, a female character, nurse Diana (Sylvia Syms), is given a prominent role, in sharp contrast to most other 1950s war films. Finally, John Mills' performance as Captain Anson is worlds apart (and deliberately so) from his usual star persona, defined by film historian Brian McFarlane as epitomising "reliability under stress".
In Ice Cold in Alex, Anson is anything but graceful under pressure. He is on the verge of cracking up due to exhaustion and incipient alcoholism and frequently lashes out at his fellow travellers. At times, he seems the least competent member of the group, and physically puny compared to big, robust men like Van der Poel and Tom Pugh (Harry Andrews). Add the fact that the film depicts one of the Allies' most difficult periods of the Second World War, as the Germans made apparently unstoppable advances in the North African desert, and it seems that the film is deliberately testing notions of English masculinity and heroism. Ice Cold in Alex shows the archetypal English hero at his lowest ebb, but it also shows his gradual recovery: not only does he succeed in his mission to get all four of them safely to 'Alex' (Alexandria), but he also wins the admiration of his enemy.

… however, I was watching an interview with Sir John Mills on Saturday, talking about ‘that scene’ in the bar.

Apparently it took 8 takes & hence Mills had had to down 8 beers in 1 & ended up being varied back to his bed to sleep it off. As Mills went on to comment, it was the best mornings work he even had! Sterling stuff.