These were tricky to research. I really need more of someone familiar with the English (British) language and the way things are referred to.
My MC are DIs in East London in modern times so their thoughts I'm trying to get accurate. They're uni-educated, well spoken men. Not looking for cockney accents.
I was wondering how are these things normally referred to:
1. Two pence - is it two pence or two pence piece? It's being used to compare it for size: "Large as a two pence ___?"
2. DI and DC are not armed and usually an Armed Response Unit is dispatched. Currently they are called SCO19, but are they referred in an abbreviated way or nicknamed like how the Metropolitan police is just referred to as Metro?
SEARCH TERMS USED:
Again, as this is really more a cultural, spoken reference, my search terms I strongly suspect, were lacking. Nevertheless, they are:
two pence pronunciation, london coinage nicknames, british slang coin, british slang sco19, nickname sco19
AUGUST 20 UPDATE
Wow! Thank you all so much for the responses! Especially catching my Met/Metro error. The 2p, two-pee reference gives me food for thought. I'm probably being too detail-obsessed since it's only used twice in an entire story but it's used in a way it would have been glaringly obvious if incorrect.
"Armed response" seems to be the general consensus and it does read so much better.
You've all given me such great guidance- before and now. Thank you all for easing my worries!