Where am I in London? Mystery Cache

There is nothing at the published coordinates, although it has a slight bearing to the solution. Study the picture and work out where it was taken.

With your GPS reader go to the exact position where the picture was taken. With the Lon/Lat readings you have to change the end digits to the following; N51' XX.244  W000' XX.X24.  (X is what you have already reading at picture location)

Nearby, with your new coordinates the cache is hidden.

The mystery cache can be solved and found 24/7.

Enjoy and don't mention the location of the picture, this is our secret!

You can check your answers for this puzzle on GeoChecker.com.