Gresham House Energy Storage Fund plc (<a href="https://www.londonstockexchange.com/stock/GRID/gresham-house-energy-storage-fund-plc/company-page" target="_blank">LON:GRID</a>) said today it has signed a tolling agreement with a unit of renewables group Octopus Energy related to 568 MW/920 MWh of energy storage projects across the UK.