'Operations, British Front, Armentieres, 7th May to 7th August 1916, and Operations on Somme, 15th September to 2nd October 1916. As commander of a company Captain McLean has shown marked ability, cool judgement and organising power. His work especially brilliant on 1st October, when his company was ordered to support the 2nd Auckland Batt. on the left flank north of Baucourt L'Abbaye. He is worthy of special mention.'
Source: London Gazette
Date: 4 January 1917

'For conspicuous gallantry and devotion to duty. He commanded his battalion during an attack upon a village, setting them a splendid example of gallantry and indifference to danger. After the village had been captured he led out two platoons through the enemy barrage against a heavy hostile counter attack, displaying throughout the operation a high example of courage and powers of leadership.'
Source: London Gazette
Date: 26 September 1917