May 1 (Reuters) - Esrey Energy Ltd EEL.V
* Esrey announces signing of a non-binding letter of intent with PRG PLC
* Esrey Energy -to acquire 100% of shares of Zinc Power from PRG and minority shareholders of Zinc Power in exchange for 39.8 million shares co Source text for Eikon: ID:nMKWD6b06a Further company coverage: EEL.V