Long time lurker, first time poster, and not a Delta pilot (but hoping to be in the near future).

Buzz,

Depends what you're into. I love history and books; lived in Cambridge for 3 years, married an English girl, and we made many weekend trips into London. My list of must see items:
- Tower of London (can be pricey, but worth it if you're into history/learning experience for the kids)

- The War Rooms. Churchill's underground command bunker during WWII. At the end of the war they basically left all the charts on the wall and just walked out, so its largely preserved exactly the way it looked in 1945.

- Buckingham Palace and the Changing of the Guard. Mandatory. Changing of the Guard happens at 1100?? (I think)

- Free lunchtime chamber music at St. Martins-in-the-Fields church. They also have evening concerts. Highly recommend.

- Foyles bookstore. It's huge...5 or 6 floors.

- Walk from St. Pauls cathedral, over the millennium bridge to the Tate Modern on the Southbank of the Thames, then along the Southbank to Westminster bridge (not a short walk!!!).

- The British Museum if you like history/archaeology. Location of the rosetta stone.

- Have dinner at Veeraswamy. It is the oldest indian restaurant in London, and is the best Indian food I have ever had. It is not cheap. I recommend the 4(5??) course sampler menu. It is 50 pounds sterling per person.

- I do recommend a double-decker bus tour. I did one with my parents a few years ago; its a great way to see much of London pretty quickly, and get a sense of what you might want to go back to.

Cheers,
Sled