The British Divers Marine Life Rescue says 'Hessy' had come up the river because they were lost or ill.
The highly unusual sight has been confirmed by British Divers Marine Life Rescue.
Figures released by the Zoological Society of London (ZSL) have revealed 138 new harbour and grey seal pups have been born in the Thames Estuary suggesting the once ‘biologically dead’ river is now healthy once again.
No one was injured, Essex Police said.
Police are on the scene.
Greenpeace activists have boarded a 23,498-tonne ship on the Thames Estuary in an attempt to stop VW diesel cars being imported
1,400 tons of live explosives remain on the wreck.
A Second World War American warship that lies at the bottom of the Thames Estuary is packed with high-grade explosive that
We want to see the UK close its goods trade deficit from a worrying £9bn; we want to see British businesses shipping UK products all around the world, from Cambodia to Canada; and we want to see these exporting companies creating jobs and wealth. If we want to realise this ambition, we will need at least three, possibly five, extra runways over the next few decades.
In business, it is essential to be fast on your feet, identifying new opportunities and reacting to threats as quickly as possible. In public life, decisions are taken far more slowly, if at all, and, often, for all the wrong reasons...