For London, UK, find the current estimated sky quality, including its Magnitude, Bortle Class, and Brightness. Then, locate the annual darkness chart for this location and provide the HTML `<img>` tag code necessary to embed it on a website.
Navigate directly to the Clear Outside forecast page for London, UK using its latitude and longitude (51.50853000/-0.12574000) by going to `http://clearoutside.com/forecast/51.50853000/-0.12574000`. Identify and extract the 'Est. Sky Quality' details (Magnitude, Bortle Class, and Brightness) from the forecast. Click the 'Show The Annual Darkness Chart For This Location' link. Locate and copy the `<img>` tag code provided for embedding the annual darkness chart.
Successfully navigate to the forecast page for 'London, Greater London, United Kingdom (51.51,-0.13)'. State the 'Est. Sky Quality' for London, including its Magnitude, Bortle Class, and Brightness. Successfully navigate to the Annual Darkness Chart for London. Provide the exact HTML `<img>` tag code for embedding the annual darkness chart.