Διαδικασία
You can browse the following addresses and find out what are the most important sights of London to include them in your itenary
https://www.visitlondon.com/things-to-do/sightseeing/london-attraction/top-ten-attractions
https://www.timeout.com/london/attractions/top-london-attractions
https://www.city-walks.info/London-en/Top-10-Sights.html
You can also watch the following video
