There are reports that a number of prisoners are involved in an ongoing incident at Maidstone prison in Kent. A Prison Service spokesman said national resources have been deployed. Inmates at the Category C prison include sex offenders and foreign nationals with more than 18 months left to serve.
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Tuesday's weather for the west of the region
Tuesday's weather for the east of the region
A further 85 buses are expected to arrive on Tuesday and Wednesday, with officials saying the entire operation will last at least a week.