Rio Tinto Alcan and Landsvirkjun Sign Landmark Agreement to Extend Power Contract to 2036

MONTREAL, June 16, 2010 - Landsvirkjun, the Icelandic power utility, and Rio Tinto Alcan have
successfully concluded negotiations on a renewed power contract for Alcan
Iceland Ltd's aluminium smelter in Straumsvik, Iceland.

The new contract runs to the year 2036 whereas the current contract could
be extended to 2024 based on Landsvirkjun and Rio Tinto Alcan reaching an
agreement by 2014.

The new contract also provides for 75 MW of additional power, which is
one of the conditions needed to carry out a planned amperage increase at the
smelter. This project would increase its annual production capacity to almost
230,000 tonnes, an addition of approximately 40,000 tonnes per year.

"This is an important milestone for our plant. The renewal of the current
power block and provision of additional power serve to strengthen the long
term operation of the smelter," said Rannveig Rist, CEO of Alcan Iceland Ltd.
"The smelter in Straumsvik directly employs 450 people and spends
approximately ISK 1.5 billion in Iceland every month."

The contract is subject to approval by the respective boards of directors
and certain conditions including clarification with respect to taxes paid by
heavy industry. These conditions are to be met by 31 August 2010.

The conclusion of these negotiations is a sign of Rio Tinto Alcan's
commitment to the continued success and further strengthening of its
Icelandic operations, and a testament to the excellent relationship between
Landsvirkjun and Alcan Iceland Ltd, which goes back more than 40 years.

About Rio Tinto

Rio Tinto is a leading international mining group headquartered in the
UK, combining Rio Tinto plc, a London and NYSE listed company, and Rio Tinto
Limited, which is listed on the Australian Securities Exchange.

Rio Tinto's business is finding, mining, and processing mineral
resources. Major products are aluminium, copper, diamonds, energy (coal and
uranium), gold, industrial minerals (borax, titanium dioxide, salt, talc) and
iron ore. Activities span the world but are strongly represented in Australia
and North America with significant businesses in South America, Asia, Europe
and southern Africa.

For further information: Rio Tinto Alcan Media Relations, Canada: Stefano
Bertolli, Tel.: +1-514-848-8151, stefano.bertolli@riotinto.com; Rio Tinto
Alcan Media Relations, Iceland: Olafur Teitur Guonason, Tel.: +354-560-7110,
olafurg@riotinto.com; Website: www.riotintoalcan.com

For further information: Rio Tinto Alcan Media Relations, Canada: Stefano Bertolli, Tel.: +1-514-848-8151, stefano.bertolli at riotinto.com; Rio Tinto Alcan Media Relations, Iceland: Olafur Teitur Guonason, Tel.: +354-560-7110, olafurg at riotinto.com; Website: www.riotintoalcan.com