Research Aim: While prisoners across the globe are criticised and studied for the negativity that goes on in their mindsets, one would rarely research the mental health problems they tend to develop when they become a prisoner for committing any crime. It is often assumed that it is the life inside the prison walls that impacts the prisoners’ mental health in a way that leads to them committing more crimes. Therefore, this research topic has been developed to study prison’s impact on prisoners’ mental well-being in the United Kingdom to eventually decrease the number of crimes that occur due to the negative environment inside the prisons.