Net Asset Value(s)

This announcement replaces announcement 5093G released at 14:10 on 29 June 2012 which showed incorrect values throughout because a multiple in the computation had been wrong.

ECOFIN WATER & POWER OPPORTUNITIES PLC

It is announced that at the close of business on 9 May 2012, the un-audited Net Asset Values per Ordinary Share and ZDP Shares of the above investment trust company were:-

Share Class

NAV (p)

NAV (p)

Increase / (Decrease)

Absolute movement

(exc. undistributed revenue)

(inc. undistributed revenue)

 (inc. undistributed revenue) %

(inc. undistributed revenue) pence

Ordinary Shares

155.23

155.92

(3.79)

(6.14)

Ordinary Shares (dilutive)*

n/a

n/a

n/a

n/a

ZDP Shares

119.70

119.70

0.13

0.16

\* The Company's Subscription Shares and 6% Convertible Unsecured Loan Stock 2016 in issue may, but not necessarily will, dilute the Ordinary Shares' Net Asset Value.

Where no dilution of Net Asset Value takes place the value box on this line will indicate "not applicable".

The diluted NAV assumes that the subscription shares rights have been exercised at 183p, being the exercise price for the period 1 June 2011 to 31 May 2012 (both dates inclusive) and that the 6% Convertible Unsecured Loan Stock has been converted at the conversion price of 172.6445p.

Fund Values (rounded)

£ '000

£ '000

Total Assets (less cash at bank)

531,864

Cash at Bank

1,799

Total Assets

533,663

Borrowings:

Prime Brokerage

55,587

6% CULS 2016

79,122

ZDP Shares

71,820

206,528

Net Assets (Ordinary Shareholders Funds)

327,135

Gearing (net debt/net assets) *

62.6%

Net debt is bank debt, the Convertible Unsecured Loan Stock and the Zero Dividend Preference Shares, less cash at bank

Notes:

* The total assets of the Company include an equity investment of £17.9 million in EIH Cyprus Group which is a joint venture between the Company and other funds managed by the Investment Manager, Ecofin Limited. 88.2% of the assets of EIH Cyprus are in cash representing the proceeds of the sale of one of the Company's investments, Solel Limited. If the above Cash at Bank figure was adjusted for this, the Company's gearing would decline from 62.6% to 57.7%.

The total assets of the Company also include approximately £95.4m in bonds. Adjusted for this, the total equity exposure of the Company is 133.42% of net assets. Adjusted for the bonds and the cash held by EIH Cyprus Group, the equity exposure of the Company is 128.58%.

Phoenix Administration Services Limited

Corporate Secretary