Some price drops at Kindle UK, probably mostly due to the new monthly sale, all at £0.99 each, unless otherwise indicated.
The Allingham Minibus: Short mysteries perfect for the festive season, by Margery Allingham (I got to read an ARC of this, and although I liked most of the stories, I'm not sure I'd call this "perfect for the festive season" unless the "festive season" under discussion is Halloween

- most of these are sort of ghost/macabre stories, and not very festive. Of course, YMMV...):
https://www.amazon.co.uk/Allingham-M...dp/B07Y22P76Z/
W is for Wasted, Wth (and next to next to last) in the Kinsey Millhone series by Sue Grafton:
https://www.amazon.co.uk/dp/B00DZQYJZ8
Field Grey, 7th in the Bernie Gunther series by Philip Kerr:
https://www.amazon.co.uk/dp/B004OR10J0
Down Cemetery Road, first in the Zoe Boehm series by Mick Herron:
https://www.amazon.co.uk/dp/B01KTS4ZYO
First Frost, first in James Henry's prequel series to RD Wingfield's Jack Frost series:
https://www.amazon.co.uk/dp/B004J4VZE8
The Railway Detective, first in the Railway Detective series by Edward Marston:
https://www.amazon.co.uk/dp/B006WB7MMU
The Patience of the Spider, eighth in the excellent IMO Inspector Montalbano series by Andrea Camilleri:
https://www.amazon.co.uk/dp/B004GKMHLK