(BBC America thriller, 2018-22) Witty and dazzling duel across Europe between security operative Sandra Oh and psychopath assassin Jody Comer.
Episode 1.02: I'll Deal With Him Later:
The opening scene is set in Bulgaria, although I doubt that this unbranded Mercedes Citaro was actually in the country:

London scenes include this Arriva London DW class DAF DB250 with Wright body:

…and assorted Wright NBFLs in background: