e-MERLIN requests proposals from the international astronomical community for observations to be made during Cycle-6. Proposals are competitively peer-reviewed under standard STFC rules by the PATT e-MERLIN Time Allocation Committee. Allocation will be made on the basis of scientific merit and technical feasibility alone.
During e-MERLIN operations ~50% of observing time has been allocated to large legacy projects and most of the remaining time will be allocated via PATT to standard proposals solicited prior to each observing semester.
See this link for detailed information.