HMP Isis

Isis Prison

Tel: 020 3356 4000 – Western Way, London SE28 0EB

Save Any Inmate At HMP Isis

75% On Their Calls

Prison Phone offers phone tariffs that reduce the costs of calls from Isis prison by up to 75%! This enables prisoners to get the support and love that they are missing from home, while reducing costs for the inmate. Find out more below.

HMP Isis is located in within the perimeter walls of HMP Belmarsh, in Thamesmead, south-east London. It’s a category C prison holding sentenced young adults and young offenders, all of whom are under the age of 25; and it has a capacity of 622. The prison opened in 2010 and was built by a private company, Interserve, who were paid £110 million for the job. If you’d like to visit HMP Isis, you can find directions using the map on this page.


Tel: 020 3356 4000

Operational capacity: 622

Western Way, London SE28 0EB

Prison Phone have been saving inmates at HMP Isis money on their calls from the prison to any UK mobile phone since 2013.

We do this by allocating a dedicated and secure local number to your mobile phone, this means when the inmate at Isis prison calls the new local number we have provided they will be charged at just the local landline rate (around 10p per minute) rather than the standard mobile rate (which is around 40p per minute).

This in turn helps to stretch the inmates PINS phone credit further and reduces the amount you need to send in for them to top up!

To open an account in less than 3 minutes please use the button below!

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Here's some facts about Isis prison.

Did you know?

Hmp Isis is a category C Young offenders institution within the perimeter of HMP Belmarsh in the Thamesmead area of Greater London. Opened in 2010, the prison has capacity for 628 inmates under the age of 30.

There are two house blocks: Thames and Meridian, both of a similar size, with four spurs radiating from a central hub and three landings on each spur. There is accommodation for an average of 80 prisoners on each spur in both single and double cells. There are also a few fully-equipped cells for prisoners with disabilities.

During the construction in 2009, a believed unexploded bomb from WWII, actually an empty shell, was uncovered by contractors clearing the area. The sites 80 contractors were evacuated until bomb disposal experts declared it was safe.

To view the latest HMIP inspection report, click here.

Visiting hours are 14:15 to 15:15 and 16:00 to 17:00 Tue-Wed. On Saturdays, visits are 09:15-10:15, 10:45-11:45, 14:15-15:15 and 16:00-17:00.

  • Interserve were paid £110 million to build the prison on an underused plot.

    isis latest facts 2
  • The prison has an amazingly low reoffence rate of just 12%!

    isis latest facts 1
  • The prison had been praised for its resettlement services and offers an extensive education programme.

    Isis prison fact 3
  • In 2012, an official report revealed that gang culture was a big problem in the prison.

    Isis prison fact 2
  • The construction site for HMP Isis had to be evacuated after builders noticed something that they believed to be a World War Two bomb. It was later found to be just the empty shell casing.

    Isis prison fact 1


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