Yes - follow the links. Maybe just two things to say here quickly. Firstly, the slang was used (like backslang and similar) to enable private talk between traders in an open market. Secondly, many phrases that started off as rhyming slang have entered into the language (at least here in UK).
[See below for enlarged list].
There was an article recently (2 months?) in press saying UK teenagers were reinventing the fashion.
That was three ...> Amongst the numerous things to say here ..
List [not exhaustive] of Rhyming slang in fairly common use, at least I think most UK people wouldn't notice anything that unusual when hearing them.
That's a load of cobblers = Cobbler's Awls = Balls
He's an absolute burke =Berkley Hunt= stupid person
Use your loaf =loaf of Bread = head
I'm just off for a Jimmy Riddle=Piddle
He's telling porkies again = Pork Pies=Lies
Its the police, Scarper! = Scapa Flow = Go
She's in a right two'n'eight=state
jamjar.com = web site that sells cars

Rod Ward =bored