6 minutes in Pennyworth gets off a route master London bus in what appears to be 60's London, in the background a modern day London bus goes past the arch.
During the fight on the landing at 1:00:18, Alfred clearly misses a punch, but a punching sound effect is heard.
In the opening sequence when Alfred travels to his job at the club, he passes criminals in the pillory. England outlawed the use of the pillory as punishment in 1837. (Use of the stocks, which trap only the feet, is still legal however.)