ExxonMobil (XOM US) (not covered): Resources growth in Guyana | Touchstone Exploration (TXP LN/CN)1; Speculative Buy, £0.25: Strong reserves update | Premier Oil (PMO LN); BUY, £1.45: FY18 results | Vaalco Energy (EGY US) (not covered): FY18 results | Wentworth Resources (WRL LN) (not covered): Operational update in Tanzania
