Video. Divya Kohli went to visit the spot where a rifle was fished out of the River Thames by two teenagers, Alex Weller and Josh Cook.
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James Wright has the latest forecast for the east of the region.
A motorist has been rescued after a car plunged over Poole quayside.
The Orkney Islands took second place, followed by Rutland and Wychavon while last year's winner Winchester falls to fifth place.