Three people, including a Thames Valley police officer, are due in court over the alleged selling of personal information.
PC Sugra Hanif, 26 and from Banbury, is accused of obtaining or disclosing personal data.
She'll appear alongside two others charged with conspiracy to commit misconduct in a public office.
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The UK drivers' train union ASLEF has offered to suspend next week's strike action. It comes as fresh talks to end the dispute are agreed.
Tuesday afternoon's weather for the east of the region
Tuesday afternoon's weather for the west of the region