The imminent logging of the Upper Florentine forest is a national disgrace, Australian Greens Leader Bob Brown said today.

"There is a large convoy of police on its way to the Florentine blockade to coincide with the beginning of logging season," Senator Brown said.

"The Upper Florentine Forest has been deemed of World Heritage value. The imminent logging operation there is a national disgrace.

"Claims by Prime Minister Rudd that native forest logging is sustainable are patently stupid," Senator Brown said.

The convoy reportedly contains 12 police cars, including two small buses with an estimated 30 police involved in the operation.

Senator Brown was flying over the site in a helicopter this morning, which was recalled to base following contact from the police.

A large banner reading ‘Save our Forests' can be seen from the sky.

Senator Brown will be available for comment later in the day; confirmation of time and place will be sent as soon as possible.

Further information: Ebony Bennett 0409 164 603