Leo Greenlees was Scottish? I thought he was Canadian. You may be confusing him with a different Greenlees family.
Leo Greenlees spoke with a broad Scottish accent apparently. He was a very close friend of Percy Chapman and they were in the London Bethel together along with Price Hughes. A sister I know tells of the three of them visiting her parents regularly when she lived at home in London. I remember Chapman and Hughes very well. Chapman and Greenlees were sent to Canada because of the Walter Salter affair (1936?) Ewart (Ed) Chitty may well have been English as you say, I remember trying to takes notes during his talks, impossible due to the speed he spoke!