Porpoises in the Thames
A pod of porpoises has swum up the River Thames to central London, say the Metropolitan Police Marine Policing Unit.
Porpoises sighted near Tower Bridge
A pod of porpoises has swum up the River Thames to central London.
The Metropolitan Police Marine Policing Unit, which is following the group of mammals, tweeted that they "seem happy enough".
Initially the river patrol team, which tweets as @MPSonthewater, reported a sighting of a dolphin at Tower Bridge.
But further updates revealed the creatures to be harbour porpoises, which usually stick to coastal areas and river estuaries, but are known to venture further upstream.
(Image shows a porpoise in the River Bann in Northern Ireland)
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