Calf was transported by water-filled barge in operation deemed ‘inadvisable’ because of low chance of survival

Rescuers have released a young humpback whale that became a national sensation after it was beached in shallow waters off the coast in Germany, although marine experts have said its chances of survival are low.

The whale, variously nicknamed Timmy or Hope, was released into the North Sea off Denmark after being transported there in a water-filled barge by rescuers.