Translation - more rhyming slang, although not necessarily 'cockney' Lady Godiva - 'fiver' (£5) Ayton Senna - 'tenner' (£10) - obviously a more modern idiom.

I have not come accross a Commodore before so am going to guess because of where it sits in the list as £15

Score - £20 (as in three-score-years-and-10 and all that) Pony - £25 - some latin root in there - that is an old one.

I don't think they are dying out, in that paying a pony is still £25 with cash or with a card.