For this itinerary, I’d recommend buying tickets online for the following places either to avoid waiting in long lines or missing out altogether because the tickets are likely to sell out days/weeks in advance: - Westminster Abbey (from Day 1) - Buckingham Palace (Day 1) - West End (Day 2) - British Museum (Day 4) - Sky Garden (Day 5) - Shakespeare’s Globe (Day 5) - Tower of London (Day 6) - Harry Potter Studio Tour (Day Trips from London)