Unaudited NAV per share

Caledonia Investments PLC
06 January 2006



Caledonia Investments plc

Unaudited net asset value per share at 31 December 2005

Caledonia Investments plc ('Caledonia') announces that its unaudited net asset
value per ordinary share as at 31 December 2005 was 1893p after deduction of the
interim dividend.

The interim dividend in relation to the year ending 31 March 2006 of 9.1p per
share will be paid on 10 January 2006 to shareholders registered on 9 December
2005.

The monthly reported net asset value per ordinary share, together with
performance statistics and information on the valuation of principal
investments, is available on Caledonia's website at www.caledonia.com.


                                                                 06 January 2006



Caledonia Investments plc                               Tel: [phone]

Tim Ingram
Jonathan Cartwright

College Hill Associates                                 Tel: [phone]

Tony Friend
Roddy Watt





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