The tube station is Warwick avenue, just get off and go to street level. Follow the signs to 'Little Venice'. There are still active canals in the middle of London where barges till roam, mostly people who lived in them. Most of them will be moored here at Little Venice and one can round the canals, takes a few hours to walk 7 miles. It is fun to see the various barges, each being home to some Londoner.