This is another possible option but one we would not recommend! This is the slowest option with a journey time of 1-2 hrs!
Buses are perfect for travelling late at night in and around London as many of the route run all-night buses. You can find further information by clicking here.
Should you miss the last tube train back to central London from Northwood Tube Station, the nearest available NIGHT BUS service is the N18. This leaves from Harrow Weald Bus Garage (5 miles from Northwood) and goes into central London. This bus stops at Baker Street, Oxford Circus and terminates at Trafalgar Square. To see the timetable, click on the timetable image above the RSVP link.