Itinerary for 3 day trip to London

Here's an ideal itinerary for 3 days in London that meets all your constraints:

Day 1:

Start your day with a luxurious breakfast at , a grand European-style café in Mayfair.
After breakfast, head to to watch the Changing of the Guard ceremony. This is a quintessential London experience that you won't want to miss!
From there, take a stroll through and make your way to . This historic church has been the site of coronations and royal weddings for centuries.
For lunch, head to Sketch, a quirky and stylish restaurant in Mayfair that serves up delicious food and drinks in a whimsical setting.
In the afternoon, explore the , one of the world's greatest collections of art and artifacts from around the globe.
End your day with a show at the West End, London's famous theater district. There are plenty of options to choose from, whether you're in the mood for a musical or a play.

Day 2:

Start your day with a visit to the , a historic castle that has served as a royal palace, prison, and armory over the centuries.
From there, take a boat ride down the to , a charming neighborhood that's home to the Royal Observatory and the Prime Meridian.
For lunch, head to , a bustling food market that's been around for over 1,000 years. You'll find everything from artisanal cheeses to fresh seafood here.
In the afternoon, visit the , a contemporary art museum housed in a former power station on the banks of the Thames.
End your day with dinner at , a classic London restaurant that's been serving up elegant cuisine since 1917.

Day 3:

Start your day with a visit to the , a world-renowned museum of art and design.
From there, head to , one of the world's most famous department stores. Even if you're not in the mood to shop, it's worth a visit just to see the opulent interiors.
For lunch, head to Sketch again, this time for their famous afternoon tea service. You'll be treated to an array of sweet and savory treats in a whimsical setting.
In the afternoon, take a stroll through , one of London's largest and most beautiful parks. If you're feeling adventurous, rent a bike or a boat to explore the park even further.
End your day with dinner at , a legendary hotel that's been serving up fine dining since 1906. Dress up for the occasion and enjoy a truly luxurious meal in a stunning setting.

I hope this itinerary gives you some inspiration for your trip to London! Let me know if you have any other questions or if there's anything else I can help you with.