Mr Justice McCombe ruled that "a fair trial on this part of the case does remain possible and that the evidence on both sides remains significantly cogent for the court to complete its task satisfactorily”.
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The 10K and half-marathon races take place almost exactly a year after Salman Abedi killed 22 in his attack at an Ariana Grande concert.
Dmitrios Pagourtzis also had several kinds of homemade explosive devices but they were not capable of detonating, county officials said.
After early mist clears, most parts of England and Wales will have another fine, warm day with plenty of sunshine.