The The London Eye, operated by British Airways was finished in 1999 for the Millennium year and has become the most popular tourist site in the UK, with over 3M visitors/year, but it's still easy to get a ride and it worth the effort as the 32 sealed and air conditioned passenger capsules.delivers great views of the city and Parliament buildings during the 30min rotation.
http://www.londoneye.com/ LondonFortnum & Mason, 181 Piccadilly London... afternoon tea here is a must do!
http://www.FortnumandMason.com London