A serving Scotland Yard officer has been charged with trying to arrange a child sex offence.
Christopher Exley, 32, will appear in court on Wednesday accused of planning to meet a child on the internet for sex.
He has been suspended from duties but will appear at Westminster Magistrates' Court on bail.
Scotland Yard said he was charged with "attempting to arrange the commission of a child sex offence, contrary to the Sexual Offences Act 2003".
The arrest is understood to have resulted from a covert operation at the force.