The Environment Agency said the low oxygen level in Pittville Lake could be algal bloom or sediment stirred up by rain, or both.
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A runner from Bristol is about to embark upon a marathon challenge around the UK, running 26 miles every day for more than a year.
People have been paying tribute to the victim of a suspected hit and run in Bristol, who has been named locally as Dan Hickey.
Church attendance may be falling across the country, but church tourism is on the increase.