Closure of HPI Agreement

Nostra Terra Oil and Gas Company plc

("Nostra Terra" or the "Company")

Closure of HPI Agreement

16 May 2011

Nostra Terra, the AIM oil and gas producer with projects in the USA, is pleased to announce that the revised agreement with Hewitt Petroleum, Inc. (now Richfield Oil & Gas Company) and Hewitt Energy Group, Inc. as announced by Nostra Terra on 14 April 2011, has now been closed with all associated documentation having been executed.

As a result, Nostra Terra has acquired a 100% working interest in the producing Bloom leases which are now being operated by the Company's wholly-owned subsidiary ,Churchill Operating LLC.

For further information, visit www.ntog.co.uk or contact:

Nostra Terra Oil and Gas Company plc

Matt Lofgran, CEO

[email protected] Telephone: +1 480 993 8933

Religare Capital Markets

Peter Trevelyan-Clark/Ben Jeynes Telephone: +44 (0)20 7444 0800

Alexander David Securities Ltd

David Scott / Bill Sharp Telephone: +44 (0)20 7448 9820

 Lothbury Financial Services Limited

Gary Middleton / Michael Padley Telephone: +44 (0)20 7868 2010