To ensure that the German was conducted smoothly and also under strict security Evans' razor and nail scissors were removed from the cell. The Reverend Stuart McLeery who was the invigilator was frisked on arrival. Police officer Stephens was deputed on duty inside the cell. All the prison officials were also put on high alert. There were two locked doors between Evan's cell and the yard. A microphone was installed in the cell as a precautionary measure through which the warden could listen to their talk by switching on the receiver. The senior prison officer, Jackson and officer Stephens had worked round the clock and made full proof arrangements and taken all the necessary precautions to ensure that the exam was conducted smoothly.

The Governor of the HM Prison, Oxford appears to be a considerate and kind-hearted fellow at the start as he arranges for an O-level language exam for a prisoner notorious for his ability to escape from the prison. However, he is quite skeptical of Evans and makes every arrangement to make sure that Evans doesn't escape. He is also rather proud and self-conscious from his prison. The Governor has presence of mind which is clear from the fact that he cross-examines every call that was made to the prison that day. He is intelligent enough to realise that he has been duped but could not judge the extent of the deception. He gets a little over-confident when he tells himself that Evans had no chance of escaping. He is short tempered and gets infuriated with his officers when Evans runs away. At last, he proves to be just another good-for-a-giggle gullible Governor when Evans tricks him again and makes a final escape. His over confidence and self-praise let him down.

Carter was the Detective Superintendent.  The Governor asked him to take Evans who was disguised as the injured McLeery along, considering that the injured man was the only one who knew what was happening or where Evans could be.