New government data suggests that prisoners go missing from UK jails at a rate of one every two days.
But it showed that although the number of absconders has risen year on year, the total of 225 was the third lowest since the current method of counting was introduced in 2004.
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The band announced at a free concert on Friday that they would take over the event's Pyramid stage on Saturday June 25.
The victims were collecting permits and escorts a day after their home town was liberated from the extremists.
Scotland Yard said the male youths will appear in custody at Westminster Magistrates' Court on Saturday.