If you are looking for an extensive 4 day London itinerary, you have come to the right place! London is one of my favorite cities in Europe! Together with my close friend I have spent many city trips to this incredible city. We spend hours exploring the city, talking free walking tours and just being a proper tourist. After hours or research, walking the city and getting information from locals, I am now sharing my best tips for spending 4 days in London! Though you possibly can’t see everything in London in 4 days, this very extensive itinerary covers as much ground and sights as possible.