Net Asset Value(s)

Caledonia Investments PLC
08 May 2008

Caledonia Investments plc

Unaudited net asset value per share at 30 April 2008

Caledonia Investments plc ('Caledonia') announces that its unaudited diluted net
asset value ('NAV') per ordinary share as at 30 April 2008, calculated as in
previous months on a cum-income basis, was 2208p, before the deduction of a
final dividend to be proposed by the directors in relation to the year then
ended.

The unaudited diluted NAV per share as at 30 April 2008 excludes any revaluation
which may arise as a result of the flotation of TGE Marine AG, formerly TGE Gas
Engineering GmbH, ('TGE') which is scheduled to be floated on the AIM market on
15 May 2008. At the planned flotation price, a revaluation of Caledonia's
interest would be expected to give rise to an increase in diluted NAV per share
of about 80p.

Following the planned flotation of TGE, Caledonia will publish an unaudited
diluted NAV per share as at the close of business on the first business day upon
which dealings in TGE shares take place, taking into account the actual
revaluation of the company's interest in TGE.

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

8 May 2008



Enquiries
Caledonia Investments plc                  College Hill Associates
Tim Ingram                                 Tony Friend
Jonathan Cartwright                        Roddy Watt
Tel: [phone]                         Tel: [phone]




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