By Jessica Frank-Keyes Outsourcing giant Mitie has landed a deal for leading electrical engineering firm ESM Power, as it continues to invest in “high growth” firms. The specialists in grid and power connections will be taken over by the Shard-based titan for a maximum of £8.5m, with the deal expected to be completed by July 31. Initial payment for the Lincolnshire power firm will run to £5.5m with performance-linked deferred payments of up to £3m to be shelled out over two years, Mitie said in a statement, and confirmed the acquisition will be funded from its existing facilities. Mark Caskey,…