If you have a skirt, with a blouse and/or a cardigan, or a dress with a cardigan and a pair of shoes without too high-heels, you are almost there. A little dash of red lipstick can finish the look, and you don't even have to do your hair up in victory rolls!
Here are some examples of forties clothing from Foyle's war, especially from Honeysuckle Weeks who plays Sam Stewart.
I love this hat. I would totally wear that!
Great pair of trousers with a blouse and a cardigan/jacket. Lovely combination
Lovely cardigan again, this time with a pink blouse.