Exhibit 8.1

List of subsidiary companies
At 31 December 2006

The principal operating subsidiary companies of the Rio Tinto Group are listed in Note 35 to the 2006 financial statements. The principal intermediate holding companies and group finance companies are as follows:

Company and country	Principal	Class of	Proportion	Group
of incorporation	activities	shares held	of class	interest
			held
			%	%
Australia
Australian Coal Holdings Pty Limited	Holding company	'A' Class Ordinary shares	100	100
		Ordinary shares	100	100
Argyle Diamonds Limited	Holding company	Class A shares	100	100
		Class B shares	100	100
Hamersley Holdings Limited	Holding company	Ordinary shares	100	100
North IOC Holdings Pty Limited	Holding company	Ordinary shares	100	100
North Limited	Holding company	Ordinary shares	100	100
Pacific Aluminium Pty Limited	Holding company	Ordinary shares	100	100
Peko-Wallsend Pty Limited	Holding company	Ordinary shares	100	100
Rio Tinto Aluminium Limited	Holding company	Ordinary shares	100	100
Rio Tinto (Commercial Paper) Limited	Finance company	Ordinary shares	100	100
Rio Tinto Finance Limited	Finance company	Ordinary shares	100	100
Rio Tinto Finance (USA) Limited	Finance company	Ordinary shares	100	100
Rio Tinto Investments One Pty Limited	Holding company	Ordinary shares	100	100
Rio Tinto Investments Two Pty Limited	Holding company	Ordinary shares	100	100
Tinto Holdings Australia Pty Limited	Holding company	Ordinary shares	100	100
		A Class shares	100	100
Bermuda
North IOC (Bermuda) Holdings Limited	Holding company	Ordinary shares of USD 1.00 each	100	100
North IOC (Bermuda) Limited	Holding company	Ordinary shares of USD 1.00 each	100	100
Rio Tinto Escondida Limited	Holding company	Ordinary shares of USD 1.00 each	100	100
Canada
Rio Tinto Canada Inc	Holding company	Class B shares no par value	100	100
		Class C shares no par value	100	100
		Class D shares no par value	100	100
Namibia
Skeleton Coast Diamonds Limited	Holding company	Shares of NAD 2.00 each	100	100
Netherlands
Rio Tinto Eastern Investments BV	Holding company	Shares of EUR 454.00 each	100	100
Rio Tinto Holdings BV	Holding company	Shares of EUR 454.00 each	100	100
Tirbit vof	Holding company	Capital not divided into parts	100	100
Tirbit Holdings BV	Holding company	Shares of EUR 453.00 each	100	100
South Africa
Palabora Holdings Limited	Holding company	Shares of ZAR 1.00 each	57.73	57.73
Rio Tinto South Africa Limited	Holding company	Shares of ZAR 1.00 each	100	100
United Kingdom
Rio Tinto Aluminium Holdings (UK) Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto Australian Holdings Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto Finance Holdings Limited	Finance company	Ordinary shares of GBP 1.00 each	100	100
		Preference shares of AUD 100.00 each	100	100
Rio Tinto European Holdings Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto Finance plc	Finance company	Ordinary shares of GBP 1.00 each	100	100
		Ordinary shares of USD 1.00 each	100	100
Rio Tinto International Holdings Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto Investments Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto Metals Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto Minerals Development Limited	Holding company	Ordinary shares of GBP 0.25 each	100	100
Rio Tinto Namibian Holdings Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto Overseas Holdings Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto South East Asia Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto Talc Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Rio Tinto Western Holdings Limited	Holding company	Ordinary shares of GBP 1.00 each	100	100
Tinto Channel Islands Limited	Holding company	Ordinary shares of USD 1.00 each	100	100
Tinto Jersey Limited	Holding company	Ordinary shares of USD 1.00 each	100	100
United States of America
Rio Tinto America Holdings Inc	Holding company	Common shares of USD 0.01 each	100	100
Rio Tinto America Inc	Holding company	Common shares of USD 100.00 each	100	100