Right.
I buy my groceries online at Tesco.com. It's great - they're delivered right to my door for just £5, no tips allowed. The selection is as big as the biggest supermarket they've got and if you know exactly what you want then this is the best way to shop. A taxi back from a grocery store costs more than five quid anyway, so I save myself the time of shopping and the money of a cab.
Tesco.com has a nifty function where you can enter in a grocery list and it does it's best to choose what you mean. It's fairly bright and has done well for me each time I try it.
This time, I wanted some pork. I got a bit of a surprise.