England footballer Michael Dawson is back at his old school in North Yorkshire today, to officially open the new all weather pitch at The Wensleydale School and Sixth Form in Leyburn.
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The men, all aged 19, were arrested on Tuesday.
Zena Victoria Jackson, 43, and her six-year-old daughter Cidalia Mendes-Jackson died after being hit by a lorry on Spring Bank in April.
Andrew Broadhead, 42, and his eight-year-old daughter Kiera died in the blaze at their home in Stanley in October.