There are fears over Olympic security after a known terror suspect entered the Olympic Park five times in a single day.
The British-born jihadist was arrested after breaching an order banning him from the area.
It's raised questions over security just days before the Games are due to begin.
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Members of Unite at 18 companies will walk out in February.
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Tahira Ahmed, a mother-of-two, also suffered two broken arms in the 'brutal and ferocious attack' at the family home in May last year.