Six months ago I bought a garden chair on eBay. When I went to the address to pick it up, the bloke drew thoughtfully on his fag and said did I want a child’s folding snooker table, balls, cues and a little brush for a tenner. At the time, my six-year-old grandson was watching a snooker championship on the television and keeping me up to date with the progress of Ronnie ‘the Rocket’ O’Sullivan, for whose lightning skill and slightly raffish persona he had developed an appreciation.