Creature or Submarine In Thames River, March 26, 2016, Video, UFO Sighting News.

Date of sighting: March 26, 2016
Location of sighting: Thames, London, England

This mysterious creature was recorded for only a few seconds, but if gives the impression that its much larger than we see. The objects shadow below the water is very long and gives me the impression of being much longer than we see on the surface. The Thames is connected to the ocean, so this could be some lost whales, or even a Russia submarine. The Russians are known for sneaking their subs into tight places in other countries. Sure it can be a alien creature, but I feel its probably a Russian sub. 
Scott C. Waring