Holding(s) in Company

John Wood Group PLC ("Company") NOTIFICATION OF MAJOR INTEREST IN SHARES 1. Name of Issuer JOHN WOOD GROUP PLC 2. Reason for Notification ACQUISITION OF VOTING RIGHTS 3. Full name of person(s) subject to notification obligation ABERDEEN ASSET MANAGERS LIMITED 4. Full name of shareholder(s) (if different from 3 above) N/A 5. Date of the transaction and date on which the threshold is crossed or reached 29 AUGUST 2012 6. Date on which issuer notified 31 AUGUST 2012 7. Threshold(s) that is/are crossed or reached ABOVE 5% 8. Notified details (A) Voting rights attached to shares Number of voting rights - Direct - N/A Number of voting rights - Indirect - 18,696,597 - 5.04% (B) Financial Instruments N/A (C) Financial Instruments with similar economic effect to Qualifying Financial Instruments Resulting situation after the triggering transaction Type of financial instrument - N/A Exercise Price - N/A Expiration date - N/A Exercise/conversion period - N/A Number of voting rights instrument refers to - N/A Percentage of voting rights - Nominal - N/A Delta - N/A Total A + B + C Number of voting rights - 18,696,597 Percentage of voting rights - 5.04% 9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable ABERDEEN ASSET MANAGERS LIMITED (and/or acting for its affiliates) as discretionary investment manager on behalf of multiple managed portfolios 18,696,597 (5.04%) PROXY VOTING 10. Name of the proxy holder N/A 11. Number of voting rights proxy holder will cease to hold N/A 12. Date on which proxy holder will cease to hold voting rights N/A 13. Additional Information N/A 14. Contact name IAN GRANT 15. Contact telephone number 01224 404301 Notification authorised by: ROBBIE M B BROWN, COMPANY SECRETARY 31 AUGUST 2012
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