HMP Thameside is a privately operated Category B prison in Thamesmead run by Serco. It is one of London's newer prisons, purpose-built to modern standards.
About HMP Thameside
HMP Thameside is a Category B male establishment situated in London, Greater London, within the London region. Operated by Serco, the prison has an operational capacity of approximately 1,232 and has been in operation since 2012.
Category B prisons hold those who don't require maximum security, but for whom escape still needs to be made very difficult. Many local prisons that serve courts fall into this category, holding both remand and sentenced prisoners.
How to Visit HMP Thameside
If you want to visit someone at HMP Thameside, you'll first need to be placed on the prisoner's approved visitor list. The prisoner themselves will need to submit your details — including your full name, date of birth, and address — for a basic security check. This process can take a few days to a couple of weeks, depending on the prison.
Once you've been approved, you can book visits in one of two ways:
- Online: Use the GOV.UK prison visit booking service — it's free and available 24/7
- By phone: Call HMP Thameside directly on 020 3856 4600 during working hours
On the day of your visit, make sure you arrive at least 30 minutes before your allocated time. You'll need to bring valid photo ID (passport, driving licence, or national identity card). There are restrictions on what you can bring into the prison — generally no phones, cameras, or electronic devices are allowed. Most prisons allow a small amount of cash for the vending machines in the visits hall.
Contacting HMP Thameside
You can reach HMP Thameside by phone on 020 3856 4600. Phone lines are typically open Monday to Friday during standard office hours. For written correspondence, the postal address is:
If you need to send money to someone at HMP Thameside, the easiest method is through the GOV.UK Send Money to a Prisoner service. It's free and takes just a few minutes online.
Sending Items to Prisoners at Thameside
Rules on sending items vary by prison, but generally you cannot send parcels directly to prisoners. Most prisons use an approved catalogue system where prisoners can order items using money in their prison account. Some establishments allow books to be sent via approved retailers such as Amazon or Blackwell's — but always check with the prison first by calling 020 3856 4600.
Phone Calls at HMP Thameside
Prisoners at HMP Thameside can make outgoing calls using the prison phone system (typically BT or a dedicated provider). They'll need credit on their phone account, which can be topped up by family and friends. Calls to UK landlines generally cost around 1p per minute, while mobile calls are more expensive. For more detail on costs, see our guide on how much prison phone calls cost.
Prisoners cannot receive incoming calls. All outgoing calls (except those to legal representatives) are recorded and may be monitored.
Frequently Asked Questions About HMP Thameside
What category is HMP Thameside?
HMP Thameside is classified as a Category B prison. Category B prisons hold those who don't require maximum security, but for whom escape still needs to be made very difficult. Many local prisons that serve courts fall into this category, holding both remand and sentenced prisoners.
What is the capacity of HMP Thameside?
The prison has an operational capacity of approximately 1,232 prisoners. This number represents the certified normal accommodation plus any additional temporary beds. Actual population levels can fluctuate and sometimes exceed capacity.
How do I contact HMP Thameside?
You can call HMP Thameside on 020 3856 4600 during weekday working hours. For written correspondence, address letters to the prisoner's full name and prison number at Griffin Manor Way, Thamesmead, London, SE28 0FJ.
How do I book a visit to HMP Thameside?
First, you need to be on the prisoner's approved visitor list. Once approved, book online at gov.uk/prison-visits or call 020 3856 4600. For more detailed information, see our guide on how to book a prison visit.
Who runs HMP Thameside?
HMP Thameside is operated by Serco. Serco is a private company contracted by the Ministry of Justice to manage certain prisons and provide custodial services.