With the references to "Ivan", it's more likely to have been about Russian spy George Blake who escaped around that time from Wormwood Scrubs , Keith . Ably assisted by Irishman , Sean Bourke, I'm sure you'll be pleased to note lol!

Asked about his motives for turning against old Blighty , Blake said that it had been his experience in the Korean War
" It made me feel ashamed of belonging to these overpowering, technically superior countries fighting against what seemed to me defenceless people. I felt I was on the wrong side ."