CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statement (Form S-8) pertaining to the Planning Sciences International plc 1996 Equity Incentive Plan and the Planning Sciences Holdings Limited Employee Share Option Scheme of our reports dated February 28, 1996, except for Note 7 - Share Option Plans and Note 14 - Share Capital, as to which the date is April 29, 1996, with respect to the consolidated financial statements and schedules of Planning Sciences International plc for the year ended December 31, 1995 included in its Registration Statement (Form F-1 No. 333-2250), filed with the Securities and Exchange Commission. /s/ Ernst & Young ERNST & YOUNG Chartered Accountants London, England November 27, 1996