Greenhithe

It was hoped the whale would find its way out without help, as it did not initially appear to be in any distress.

An off-course beluga whale was spotted splashing around near London, and Brits can’t quite believe it.

People are being warned not to touch the creatures, which are most often found in oak trees -- and to keep pets away from them, too.

What will British gardens look like in 20 years’ time? Robbie Blackhall-Miles finds some clues at the Chelsea flower show