BBC web report
http://news.bbc.co.uk/1/hi/england/london/4635874.stm
with video link and diagrams of the unsuccessful rescue bid.
I've been amazed and gratified by the huge amount of international interest in this story. What began as almost humorous - 'a whale in London is as rare as the Queen riding a bicycle'

(Swiss TV news) - became more and more tragic as the sad news unfolded.
Amongst the continuing dreadful news from Iraq and elsewhere, this was a story to bring us down to earth and shed a quiet tear.