A passing tug saw the mammal, a young female humpback measuring around 36ft (11 metres) long, off the Isle of Sheppey in Kent.
Local navigation warnings were issued to vessels in the area to be aware of the floating carcass before it was towed to Sheerness Docks, Thames Coastguard said.
More top news
A report by a group of MPs urges Ofcom to offer compensation to customers who do not get the internet speeds they pay for.
Philippa has the weekend weather for the east
Philippa has the weekend weather for the west