Transaction in Own Shares

Wm Morrison Supermarkets Plc

9 September 2011

Further to the announcement of its irrevocable, non-discretionary share repurchase programme, Wm Morrison Supermarkets PLC ("the Company") announces that on 9 September 2011 it purchased 25,000 ordinary shares at an average price of 301.2950 pence per share.

These shares will be cancelled.

Pursuant to the irrevocable mandate granted by the Company to Barclays Bank Plc ("Barclays") on 31 May 2011, Barclays informed the Company today that on 16 August 2011, due to an operational error, 2,000,000 shares in the capital of the Company were delivered and cancelled, 900,000 shares more than the 1,100,000 shares previously disclosed. As a consequence, the RNS issued by the Company on 16 August 2011 (and all subsequent RNS announcements in the period up until and including 8 September 2011) overstated the number of shares in the Company's issued share capital by 900,000 shares. Those 900,000 shares have now been cancelled.

After taking this into account the Company confirms that the Company has 2,574,641,529 shares in issue. The Company holds no ordinary shares in Treasury.

This number (2,574,641,529) represents the total voting rights in the Company and may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, Wm Morrison Supermarkets Plc under the FSA's Disclosure and Transparency Rules.

Enquiries

Wm Morrison Supermarkets Plc 0845 611 5000

Paul Coyle