Very similar to C-4, British origin,
and that the connexion is perfect.
Money Heist Season 1, Episode 11
(in high-pitched, fancy British voice):
Oh, Duchess, look at me.
The Big Bang Theory Season 7, Episode 20
All right, where's
Tall British Dave taking you?
The Big Bang Theory Season 9, Episode 8
Fine. Um, he's British.
The Big Bang Theory Season 9, Episode 8
"...the British ambassador’s daughter,
Alison Parker...."
Money Heist Season 1, Episode 7