A police spokesman said Sam Woodhead was a little sunburned when he was found, but was hydrated and otherwise well. His family has been notified.
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The curious marsupial went for a late night stroll round the A&E department before casually going back out the way it came.
There will be a mixture of bright spells and scattered - possibly thundery - showers today.
As the election campaign draws to an end, the Liberal Democrat leader says that voters face “the biggest political decision" of their lives.