The story takes place in 1945, but all the women's hairstyles and clothes, particularly the high fashion designs worn by Lana Turner, are strictly 1958.
Lana Turner's elegant apartment to say nothing of her doting maid servant would have been beyond the availability and means of even the most wealthy Londoners during the critical era of World War Two. Studio recreated exteriors show no evidence of the blitz or any kind of related wartime damage.
The mink coat repeatedly worn by war correspondent Lana Turner is hardly the thing a person of her financial means would have been able to afford and is laughingly out of place in wartime London, and even if she did own it, would hardly have been so blatantly and casually displayed among her lesser paid co-workers, but none of them seem to notice or care.