Blocklisting Interim Review

Informa PLC 10 January 2006 BLOCKLISTING SIX MONTHLY REVIEW 1. NAME OF COMPANY: INFORMA PLC 2. NAME OF SCHEME: INFORMA GROUP PLC DISCRETIONARY SHARE OPTION SCHEME 3. PERIOD OF RETURN: FROM: 04/06/2005 TO: 04/12/2005 4. NUMBER AND CLASS OF SHARE(S) (AMOUNT OF STOCK/DEBT SECURITY) NOT ISSUED UNDER SCHEME AT END OF THE LAST PERIOD: 662,133 ORDINARY SHARES OF 10 PENCE EACH 5. NUMBER OF SHARES ISSUED/ALLOTTED UNDER SCHEME DURING PERIOD: 186,439 6. BALANCE UNDER SCHEME NOT YET ISSUED/ALLOTTED AT END OF PERIOD: 475,694 7. NUMBER AND CLASS OF SHARE(S) 450,000 ON 15/07/98, (AMOUNT OF STOCK/DEBT SECURITIES) 500,000 ON 18/06/99, ORIGINALLY LISTED AND THE DATE OF ADMISSION: 830,000 ON 07/02/00, 640,000 ON 05/04/01, AND 540,000 ON 20/05/05 - ALL ORDINARY SHARES OF 10 PENCE EACH PLEASE CONFIRM TOTAL NUMBER OF SHARES IN ISSUE AT THE END OF THE PERIOD IN ORDER FOR US TO UPDATE OUR RECORDS. 421,345,692 AS AT 4 DECEMBER 2005 CONTACT FOR QUERIES NAME: ANDREA CALLABY TELEPHONE: 020 7017 4311 END This information is provided by RNS The company news service from the London Stock Exchange

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