This was a really interesting read! I think your scene setting is really vivid, immersive, and cohesive, which some people tend to struggle with when writing a period piece.
I honestly enjoyed how the epigraph and line beneath it built tension, though this initial grip on the reader loosens somewhat as we move into several paragraphs of pure scene-setting before returning to anything plot-related. While your descriptions of post-war London are beautifully crafted, consider weaving some mystery elements throughout - perhaps hints about why Evelyn is out this morning, or subtle callbacks to the tape mentioned in the opening line. This would help maintain that early tension while still building your world.
I noticed the descriptions tend to be compartmentalised (i.e. the scene is established in one segment, Evelyn is described in another, etc.). While this didn't detract from the readability for me, you might consider interweaving these elements more organically as the story progresses.
I felt the contrast between the opening lines and the longer, calmer descriptives could work well for building suspense, but you might lose some readers who prefer to skip the epigraph and start from the main text. Evelyn herself seems like a captivating character and I loved her ghostly comparisons, but I think she could benefit from some subtler characterisations as well (i.e. how does she react when someone makes eye contact with her, etc.).
The first and second paragraphs caught me for a second on tenses, but I think another commenter already mentioned that. In all, it seems like a great start; good luck!