What to buy in London
Answer: Buy whatever you want!
You can refer to the following places:
1. Regent Street and Oxford Street
These two streets are the most famous shopping streets in London, with shops of all sizes, from high-end to mid-range. (If you want to shop for the most upscale, you can also go to the nearby Selfridges Shopping Mall and the Old Bond Street.)
Regent Street, for example, has the famous French brand Maje, which sells nice clothes; the American Kate Spade - with novel bags, jewelry and clothing styles; and the British Burberry, etc.
For souvenirs, you can go to Whittard's Tea Shop, or the Queen's favorite snack shop near Piccadilly! (Highly recommended)
2. Harrods
Harrods is a high-end department store with a history of over 100 years. It sells everything from Longchamp, Gucci, Dior to LV, Prada, and Chanel.
Those want to buy luxury goods can come here, or go to Selfridges and Old Bond Street near Oxford Street mentioned above.