If you liked BM you will probably like the Slough House series of novels by Mick Herron (MH said
BMis his favourite writer).
There are 11 novels in the series and it is worth reading them in order. The novels are about a dumping ground for failed spies who screw up, have addictions, are mentally damaged etc led by a disgusting wretched apology for a human being.
Very well written and exceedingly funny.
I made a horlicks of that post.
Mick Herron said Charles Cumming was his favourite espionage writer.
Herron's Slough House/Slow Horses novels are still excellent though.