monkey
250 quid
20 quid.
There both 500 pounds.. SAME!
The pound is the unit of currency in the UK - it's what the English call their money instead of 'dollars'.
The closest word to chance in rhyming slang is chancer, and there are two versions. Chancer ... Ballet Dancer ("Cor he ain't half a Ballet Dancer") Chancer (someone not qualified) ... Bengal Lancer