GPS record of London walk
My Wintec G-Rays 2 GPS logger recorded some stray points, and was accuracy was generally poor in town. The actual route began at the Tower of London, then south over Tower Bridge, then we walked west more or less along the Queen's Walk on the south side of the Thames River to the Millennium Bridge.
No doubt the device had interference due to the tall buildings in London. It did a lot better a year later in the clear fields of Gettysburg.