Ras Al-Khaimah state firm Rak Gas has signed a Production Sharing Agreement (PSA) with the semi-autonomous Zanzibar region of Tanzania. The PSA covers the 11,868km² onshore/offshore Pemba Zanzibar Block and the firm says it “is proud to be the company to enter into Zanzibar’s first ever exploration project.”

What Rak Gas’ 29 October press release omits is that this is merely the latest twist in the firm’s efforts to develop the block. Its history there...