More than 200 trees will be chopped down in a park in Peterborough as part of a review of tree safety across the city.
The council say the work was already due to go ahead, before the death of a teenager who was hit by a falling branch in a nearby park last year.
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A large tent has been put up around the area while investigations continue.
The kind gesture touched the hearts of many who shared and retweeted words of support for the officer on Twitter.
Two workers were forced into a back office as the robbers tried to force their way into a safe, police say.