Why was No.2 given a second chance? Because in ‘A B and C’ the failure was not his alone! In ‘Once Upon a Time’ No.2 is a good man who is worth risking. But primarily because during ‘The Chimes of Big Ben’ this particular No.2 struck up a relationship with No.6, enjoying a rapport together, something which would be a necessity during 'Decree Absolute" – ‘Once Upon a Time.’
So it would seem that No.24 was right. There are second chances for the lucky ones!
Be seeing you