TSTR.L Regulatory News (TSTR)

TRI-STAR RESOURCES PLC

("Tri-Star" or the "Company")

Update re Proposed Joint Venture

Further to the announcement made by the Company on 28 June 2011, relating the non-binding letter of intent ("LOI") entered into with Portage Minerals Inc ("Portage") in respect of Portage's Bald Hill antimony project in New Brunswick, Canada, Tri-Star is pleased to announce that it has now satisfactorily completed its due diligence period.

Following completion of this due diligence, Tri-Star is currently in ongoing negotiations with Portage in relation to the LOI and an extension to the timing for completion of a binding joint venture agreement, previously scheduled to be completed by 31 August 2011, and further announcements will be made in due course.

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