3i Infrastructure Regulatory News (3IN)

16 December 2011

Lakeside Network Investments consortium agrees to buy Vattenfall's electricity distribution and heat businesses in Finland

LNI Acquisition Oy ("LNI"), a consortium comprising 3i Infrastructure plc and 3i Group plc (45% share), GS Infrastructure Partners (45% share) and Ilmarinen Mutual Pension Insurance Company (10% share), has signed an agreement to acquire 100% of the equity in Vattenfall Oy ("Networks Finland") and Vattenfall Lämpö Holding Oy ("Heat Finland", together the "Target") from Vattenfall AB. 3i Infrastructure plc and 3i Group plc are investing through 3i Networks Finland LP, a partnership in which they have taken 87% and 13% stakes respectively.

The transaction values the Target at approximately €1.54 billion. LNI will fund the acquisition through a combination of equity and debt and 3i Infrastructure plc will contribute €236 million in equity to the transaction.

Networks Finland is the second largest electricity distribution network in Finland. Headquartered in Tampere, it serves around 400,000 customers in South West Finland, and has a 12% market share.

Heat Finland operates a broad-based district heating and gas business in Finland.

The transaction is expected to close in the first quarter of 2012.

ENDS

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Notes to Editors

3i Infrastructure plc is a Jersey-incorporated, closed-ended investment company that invests in infrastructure businesses and assets and is regulated by the Jersey Financial Services Commission. The Company is building a diversified portfolio of infrastructure investments across the globe, with a focus on Europe and India. As of 30 September 2011, 3i Infrastructure had a portfolio of 15 assets valued at £716 million, and net assets of £1,030 million. The Company listed on the London Stock Exchange in March 2007, raising £703 million in an initial public offering and a further £115 million in a subsequent placing and open offer in July 2008, and is a constituent of the FTSE 250 index.

3i Investments plc, a wholly-owned subsidiary of 3i Group plc, is authorised and regulated in the UK by the Financial Services Authority and acts as Investment Adviser to 3i Infrastructure plc.

For more information, please visit www.3i-infrastructure.com.

This press release is not for distribution (directly or indirectly) in or to the United States, Canada, Australia or Japan and is not an offer of securities for sale in or into the United States, Canada, Australia or Japan. Securities may not be offered or sold in the United States absent registration under the U.S. Securities Act of 1933, as amended (the "Securities Act"), or an exemption from registration under the Securities Act. Any public offering to be made in the United States will be made by means of a prospectus that may be obtained from the issuer or selling security holder and will contain detailed information about 3i Group plc, 3i Infrastructure plc, 3i India Infrastructure Fund and management, as applicable, as well as financial statements. No public offering in the United States is currently contemplated.