[Sugar chair] No.

[Supermarkets] Supermarkets may be pretty comprehensive, but they don't sell everything. I'd only expect this to show up in the biggest supermarkets (and the right specialist shops), so when asked about 'normal' supermarkets I said no. I don't think Twickenham Waitrose has 'em, for example, and that's a good-sized shop. But for Kingston Waitrose, which is quite a bit larger, I reckon the balance tips. You all need to tell me the precise square footage of your nearest supermarket, then I'll redo the calculations. :-)