Portfolio Update Quarterly

Securities Trust of Scotland plc
                  Stock Exchange Announcement - 3 October 2006


In accordance with the Listing Rules, which require, inter alia, UK-listed
investment companies to notify to a Regulatory Information Service, within two
business days of the end of each quarter, a list of all investments held by them
with a value greater than 5% of the company's gross assets and at least the
company's 10 largest investments as at the last business day of that quarter,
Securities Trust of Scotland plc announces that, as at 29 September 2006, its 10
largest investments were:

                                 % of gross
                                   assets
BP                                   6.6
Royal Dutch Shell                    5.3
HSBC                                 5.2
Royal Bank of Scotland               5.1
British American Tobacco             4.2
GlaxoSmithKline                      3.7
Vodafone                             3.6
Scottish & Southern Energy           3.5
Barclays                             3.2
Aviva                                2.9



For further information, please contact:

Ross Watson
Martin Currie Investment Management Ltd                0131 229 5252