Ten people have been charged in connection with downloading child pornography following the biggest police investigation of its kind.

A total of 158 people have been arrested in Sussex as part of Operation Chaucer which was triggered when US authorities uncovered a world-wide child porn web site.

Sussex Police today said two of the ten Sussex people charged had been dealt with.

One was jailed for four months and placed on the Sex Offenders Register for seven years.

The second was given three years rehabilitation, ordered to attend a sex offenders' clinic for 60 days and placed on the register for five years.

The other eight have yet to be dealt with and a further seven people have been given a police caution and placed on the register.

Police have seized hundreds of computers and thousands of DVDs and other storage items.

Chaucer was launched when US authorities sent names of people purchasing images with credit cards to all police forces in the country.

Extra staff were drafted in to help with the Sussex investigation.

Sussex Chief Constable Ken Jones said the force was one of only two or three in England and Wales which had made so much headway with the investigation.