Although I'm from Oz we had many of the coins and (differently coloured) the notes mentioned above, although the slang was usually different; many have fallen into disuse since we got dismal guernsey.

"Eighteen pence"- where was that quaint phrase in use, so redolent of powdered wigs? It were always one-and-six when I were a lad. The price of fish and chips at Kidd's.

PMB, I vaguely remember the schoolyard rhyme that mentioned 18 pence, even in Oz. It started

When I was young and had no sense
I took a girl behind the fence
I gave her a penny but she wouldn't have any
I gave her a trey (thr'pence) and she said she may
I gave her a zack (sixpence) and she showed me her crack
....

but I don't recall the rest.
As you can tell, it relies on Oz slang for the currency names.

Cheers, Rowan