<P> Her Majesty 's Prison Wakefield is a Category A men 's prison , located in Wakefield , West Yorkshire , England . The prison is operated by Her Majesty 's Prison Service , and is the largest high - security prison in the United Kingdom ( and western Europe ) . The prison has been nicknamed the `` Monster Mansion '' due to the large number of high - profile , high - risk sex offenders and murderers held there . </P>
<P> Her Majesty 's Prison Wakefield is a Category A men 's prison , located in Wakefield , West Yorkshire , England . The prison is operated by Her Majesty 's Prison Service , and is the largest high - security prison in the United Kingdom ( and western Europe ) . The prison has been nicknamed the `` Monster Mansion '' due to the large number of high - profile , high - risk sex offenders and murderers held there . </P>
what is the highest security prison in the uk
what is the highest security prison in the uk
Her Majesty 's Prison Wakefield
Her Majesty 's Prison Wakefield