Re Spurs...
There is a claim in Eric Partridge's Dictionary of Catch Phrases that the approving words, �Nice one!' - apparently coined by the writer Peter Mayle - first appeared in a Wonderloaf TV advertisement in 1972. In that, bakers used the words 'Nice one!' to congratulate each other on their loaves and the last baker named was Cyril...hence "Nice one, Cyril!"
Tottenham Hotspur football fans then took it up as a chant in support of their player, Cyril Knowles, and that then went on to be a Top Twenty song as sung by Cockerel Chorus.
After that, it was so widespread that it came to be used to show approval in all sorts of circumstances.