Press Release 23 August 2011Successful Appraisal Well Offshore Mozambique

Wentworth Resources Limited (OSE: WRL)

Wentworth Resources Limited (“Wentworth” or “the Company”), an independent oil and gas company focused in East Africa, is delighted to note the announcement by Anadarko Petroleum Corporation (“Anadarko”), the Operator of the Rovuma Offshore Area 1 block regarding the successful Barquentine-2 appraisal well.

Barquentine-2, situated in the Windjammer, Barquentine and Lagosta complex, is the first appraisal well in the offshore programme. Wentworth has a 4.95% overriding royalty interest in Cove Energy’s 8.5% pro rata share of profit petroleum in Rovuma Offshore Area 1, Offshore Mozambique.

Highlights:

• The Barquentine-2 appraisal well encountered more than 230 net feet (70 meters) of natural gas pay in high-quality Oligocene-age reservoirs

• Barquentine-2 appraisal well was drilled to a total depth of approximately 13,500 feet

(4,100 meters) in approximately 5,400 feet (1,650 meters) of water

• The results of the Barquentine-2 appraisal well, which is located approximately 2 miles (3 km) east-southeast of the Barquentine-1 discovery well, also indicated that the Oligocene reservoirs are in static pressure communication between the wells

• The drillship is now being mobilized to the south to drill the Camarão exploration well, which also will serve as an appraisal to the Windjammer discovery

• A subsidiary of Anadarko and co-owners in the Offshore Area 1 have awarded contracts to KBR and Technip to perform pre-FEED studies for an LNG plant in Mozambique. The pre-FEED studies are designed to assess the viability of developing an LNG facility to produce and process natural gas from the region.

The other partners in the block are as follows; Anadarko, Operator, with a 36.5 % working interest. Co-owners in the area include Mitsui E&P Mozambique Area 1, Limited (20%), BPRL Ventures Mozambique B.V. (10%), Videocon Mozambique Rovuma 1 Limited (10%) and Cove Energy Mozambique Rovuma Offshore, Ltd. (8.5%). Empresa Nacional de Hidrocarbonetos, E.P.'s 15-percent interest is carried through the exploration phase.

A map of recent and planned activity in the Offshore Area 1 is available on Andarko’s website under the "Media Center/Anadarko News" tab at http://www.anadarko.com/.

Bob McBean, Wentworth Executive Chairman commented:

“We are delighted with the results of the Barquentine-2 appraisal well. This is the first appraisal well drilled on the block; further endorsing our confidence that this area has the potential to be a world class gas accumulation.

Further major steps have also been achieved in the award of the pre-FEED work for a prospective LNG plant and there is a significant ongoing exploration and appraisal programme planned; from which we look forward to providing further updates.”

Enquiries:

Wentworth Resources

Robert McBean, Chairman

rpm@wentworthresources.com

Eric Fore, Finance, Investor & Public Relations

etf@wentworthresources.com

Axxept

Public Relations

+ 47 90 02 1900

Per Arne Totland

totland@axxept.no

Or visit our website at www.wentworthresources.com

FORWARD LOOKING STATEMENTS

This news release may contain forward-looking statements including expectations of future production, cash flow and earnings. These statements are based on current expectations that involve a number of risks and uncertainties, which could cause actual results to differ from those anticipated. These risks include, but are not limited to: the risks associated with the oil and gas industry (e.g. operational risks in development, exploration and production; delays or changes in plans with respect to exploration or development projects or capital expenditures; the uncertainty of reserve estimates; the uncertainty of estimates and projections relating to production, costs and expenses, and health, safety potential delays or changes in plans with respect to exploration or development projects or capital expenditures.

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