I loved my trip to London in March. I went to Loop, Fortnum & Mason and Liberty and all were spectacular. I enjoyed Harrod's but found it a bit overwhelming. The food halls are awesome though (for tea, jam, honey, sweets, I thought Fortnum had a more diverse selection).
I also had a manicure at Imarni in the BoxPark in Shoreditch. Even if you don't need a mani and/or pedi, BoxPark is an awesome place to visit. There are teeny little shops on the street level, including local, artisanal and vintage goods (I scored three vintage silk blouses - all designer - at one shop; the prices were fantastic too). Excellent food and drink upstairs.
Continuing the pampering theme, I had a facial at Pfeffer Sal on my last evening, which was absolutely perfect.
I stayed at the Intercontinental Park Lane for the business portion of the trip. It was lovely and convenient for business, but not what I would be looking for on a vacation (not characterful, too expensive). For the mini-vacay bit, I moved to the Hoxton Holborn, which I LOVED. Great price, excellent service and a convenient location (on two tube lines).
Lastly, my favorite eats included dinner at Nobu (for business so not out of my pocket, happily) and breakfast at the Wolseley. The breakie at the Hoxton is also delicious. They have a half-size one which was perfect for me. Though I did manage to get through the much larger one at the Wolseley without much difficulty! A can't miss stop for foodies is the Borough Market. It's like Pike Place on steroids.