Cross bindweed with the giant redwood with skunk. Voila, a dope plant that grows 200 ft in a month. Local area Internet shopping. Instead of spending 200 million on a huge national operation, warehouses in every city and a fleet of lorries, run it in a very limited area on a very small scale. Kind of like Tesco in Enfield, but without the IRL brandname.
Cars are a menace and handy too.
For life in London however you really don't need one. Several of them are illegal, of course, so please don't get me into trouble by doing anything.