Giving evidence to the Leveson Inquiry into press standards, the Met's Deputy Assistant Commissioner Sue Akers alleged two prison officers at two separate high security prisons took payments from journalists.
The first official is accused of receiving payments from Trinity Mirror, News International and Express Newspapers between April 2010 and June 2011, totalling nearly £35,000.
Another prison officer at a different high security prison allegedly received payments from Trinity Mirror between February 2006 and January 2012, totalling more than £14,000, the inquiry heard.
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Downpours keeping us on our toes today
The M20 in Kent has been closed in both directions after a pedestrian bridge allegedly collapsed on the motorway on Saturday.
The AA have warned of traffic jams and urged people to carry extra water in their vehicles because of the warm weather.