Teddington Lock House, London.
Teddington Lock is a lock (or lock complex) and weir on the River Thames in England at Ham in the western suburbs of London. The lock is on the southern Surrey side of the river.
It is at the highest point on the river to which tides penetrate, the river downstream being known as the Tideway. The boundary point between the Port of London Authority, which is the navigation authority downstream, and the Environment Agency, which is the navigation authority upstream is marked by an obelisk on the Surrey bank a few hundred yards below the lock.

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jill browne (42 months ago | reply)
london.skiponover.com/teddington-lock-house-o n-the-river-...
Hi Jim,
If the Internet works the way I expect, my blog post featuring your lovely photo will go live on Jan. 11/09.
Thank you so much for sharing this picture, and for the informative write-up.
If you want me to change the way I have credited you, please let me know. (Include the URL of my post, if you don't mind - easier for me to find it!)
Happy New Year,
jill
calgary, canada
This photo was invited and added to the The Freshwater River Thames group.