Thousands of pop fans were at the arena in Newcastle for Metro Radio Live. Among the chart-topping acts were Little Mix, Example, Lawson, Union J, Pixie Lott and Conor Maynard.
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Police are appealing for information following four incidents of indecent exposure in several areas of Northumberland.
Gregg was previously found guilty of nine counts of indecent assault against four boys aged between 11 and 14 over three decades.
A Middlesbrough primary school has been closed for the day after a fire broke out, causing damage to a corridor and staff office.