Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES

1. Identity of the issuer or the underlying issuerof existing shares to which voting rights areattached:

SHANKS GROUP PLC

2 Reason for the notification (please tick the appropriate box or boxes):

An acquisition or disposal of voting rights

YES

An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached

NO

An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments

NO

An event changing the breakdown of voting rights

NO

Other (please specify):

NO

3. Full name of person(s) subject to thenotification obligation:

IMPAX ASSET MANAGEMENT GROUP plc

4. Full name of shareholder(s)  (if different from 3.):

IMPAX ASSET MANAGEMENT LTD

IMPAX ASSET MANAGEMENT (AIFM) LTD

FUNDS (ALL HOLDING

5. Date of the transaction and date onwhich the threshold is crossed orreached:

29/07/2014

6. Date on which issuer notified:

31/07/2014

7. Threshold(s) that is/are crossed orreached:

3%

8. Notified details:

A: Voting rights attached to shares

Class/type ofshares

if possible usingthe ISIN CODE

Situation previousto the triggeringtransaction

Resulting situation after the triggering transaction

NumberofShares

NumberofVotingRights

Numberof shares

Number of votingrights

% of voting rights

Direct

Direct

Indirect

Direct

Indirect

Ordinary Shares

GB0007995243 LN

12,176,760

12,176,760

11,926,760

N/A

11,926,760

N/A

2.9986%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Expirationdate

Exercise/Conversion Period

Number of votingrights that may beacquired if theinstrument isexercised/ converted.

% of votingrights

NIL

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financialinstrument

Exercise price

Expiration date

Exercise/Conversion period

Number of voting rights instrument refers to

% of voting rights

NIL

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

11,926,760

2.9986%

9. Chain of controlled undertakings through which the voting rights and/or thefinancial instruments are effectively held, if applicable:

IMPAX ASSET MANAGEMENT LTD (FRN: 197008) HOLDS 1.6186% IN SHANKS GROUP PLC THROUGH VARIOUS FUNDS (ALL HOLDING

IMPAX ASSET MANAGEMENT (AIFM) LTD (FRN: 613534) HOLDS 1.38% IN SHANKS GROUP PLC THROUGH ONE COMPANY (HOLDING

BOTH IMPAX ENTITIES ARE 100% CONTROLLED BY THE OVERALL PARENT IMPAX ASSET MANAGEMENT GROUP plc WHICH HOLDS AGGREGATE CONTROL OF 2.9986% IN SHANKS GROUP PLC THROUGH ITS SUBSIDIARIES.

Proxy Voting:

10. Name of the proxy holder:

N/A

11. Number of voting rights proxy holder will ceaseto hold:

N/A

12. Date on which proxy holder will cease to holdvoting rights:

N/A

13. Additional information:

Based on 397,741,042 issued ordinary shares

14. Contact name:

Mike Browning - Head of Compliance

15. Contact telephone number:

+44 (0) 20 7432 2626