For this special edition of Adventures in Wine, David hunkers down with Tom Ashworth over a single (yes, you read that correctly, 'single') bottle of wine: an investment grade Pauillac, Grand-Puy-Lacoste that has lain unopened since 2005. It's a perfectly sumptuous sip, of course, but leaving your wine to languish in the cellar, when it could be fulfilling its destiny in your glass doesn't just improve the flavour, it can also work wonders for your bank balance, as Tom, with a wealth of financial knowledge at his disposal, explains. Yes, investing in wine is the bibulous equivalent of having your cake and eating it - as long as know your onions, of course - or in this case, grapes.