A bunch of price drops at Kindle UK, mostly to £0.99, mostly first-in-series, probably mostly as part of the June monthly price drops.
Gamble by Felix Francis (first in Felix Francis continuation of "Dick Francis themed" titles):
https://www.amazon.co.uk/dp/B005GET4XO
Corpus, Professor Tom Wilde series by Rory Clements:
https://www.amazon.co.uk/dp/B06XZ9DLZR
Deadly Summer, Darling Investigations by Denise Grover Swank:
https://www.amazon.co.uk/Deadly-Summ...dp/B072MFCHTM/
Medicus: Gaius Petreius Ruso series (excellent IMO) by Ruth Downie:
https://www.amazon.co.uk/dp/B07B659FYD
The Incubus, 4th in the Thomas Berrington series by David Penny (not sure about Rivertree Print, but I've read the first three in the series, also Rivertree, and liked them, so posting this one):
https://www.amazon.co.uk/dp/B01NAC7O9H
The Zig Zag Girl, Stephens and Mephisto series by Elly Griffiths:
https://www.amazon.co.uk/dp/B00L7SLUJY
The Beekeeper's Apprentice, Mary Russell & Sherlock Holmes series (also excellent IMO) by Laurie R. King:
https://www.amazon.co.uk/dp/B006WB7JOG
The Neon Rain, Dave Robicheaux series by James Lee Burke:
https://www.amazon.co.uk/dp/B003PPDICO
The Savage Altar, apa
Sun Storm, Rebecka Martinsson series by Asa Larsson:
https://www.amazon.co.uk/dp/B002RUA4IY
A is for Alibi, Kinsey Millhone series (a classic, IMO) by Sue Grafton:
https://www.amazon.co.uk/dp/B004P1JF2E