Manston Mutiny occurred in August 1940 during the Battle of Britain. Manston was one of RAF Fighter Command's forward airfields in Kent and was subjected to persistent attack by the Luftwaffe. At the height of the bombing, some 100 new ground staff had arrived, but there was no opportunity to get them settled. Consequently, they and others sought shelter in the labyrinth of caves under the airfield and refused to come out. Officers, too, succumbed to the strain of the ceaseless raids on Manston.
"By now, after four all-out raids, few building;, were even tenable. With all water cut off, men shaved at the pre-war swimming pool - if they shaved at all. Many were close to breaking point; in the nick of time Squadron Leader James Leathart, 54 Squadron, stopped an overwrought technical officer firing blind down the shelters to flush the scrimshankers out. Mansion's chaplain, the Reverend Cecil King, acted as promptly. Near-berserk, another officer had burst wild-eyed into the mess. a revolver trembling in his hand, threatening to finish off himself and every man present. Gently, King led him from the room, talking of God’s infinite mercy, until the man broke down and surrendered his gun”
The Stress of Battle: Quantifying Human Performance in Combat by David Rowland, Great Britain: Ministry of Defence. Page 188
It appears that the internal quotation was from page 144 of Eagle Day by Richard Collier