Dear travelers, London and Greenwich seem to be a construction site prior to the upcoming Olympics, esp. when you walk toward the "Royal Observatory Greenwich" where you have the Zero Meridian and the big GMT / now UTC clock with 24 hr display as well as the "old" British measures of length.
Yes, the view is somewhat different to one year ago. Near the National Maritime Museum, the Olympic Equestrian Events will take place. For this purpose, a stadium, still under construction, for about 20.000 specatators is being built.
Greenwich is a must on your London trip.
# 1 The historical Cutty Sark sailing ship - the museum is totally renovated.
# 2 The National Maritime Museum for all "sea bears", old or young. They provide awesome highlights for the kids. You can stay there all day long if you like. Library is open for anyone, really interesting historical stuff to look in.
#3 Royal Observatory Greenwich
How to get there:
# 1 From "Bank", take the DLR towards Lewisham. You reach this historical place still in "zone 2".
# 2 From "Tower Gateway" take any DLR to Westferry and change there to DLR "Lewisham".
#3 By Thames river boats, they stop at "Greenwich Pier". I also took the KPMG Thames Clippers - adult day ticket cost you GBP 9.10 after 1/3 reduction with your valid Oyster Card. It's also river hop on-off. You can get from "Embankment Pier" via "London Eye" to "The O2 Pier" and back.
Hop off "Greenwich Pier" and enjoy the picturesque and historical sites there.