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Family communication toolkit

Contacting HMP Grendon

A step-by-step guide for families using the United Kingdomprison system. Everything below is aggregated from public sources; the prison's own official channels are linked where available.

Data is aggregated from public sources and may be incomplete or out of date. Always verify with primary sources before acting on any figure. See data sources.

Send mail to United Kingdom

Address block. Copy and paste into your envelope or shipping label.

Prisoner Full Name & Prisoner Number
HMP Grendon
HMP Grendon Grendon Underwood Buckinghamshire HP18 0TL See map Help us to improve this page. Give us your feedback in this 2-minute survey .
Buckinghamshire HP18 0TL
South East England
United Kingdom

This prison's specific mail rules

Format: Prisoner Name & Number, HMP Grendon, HMP Grendon Grendon Underwood Buckinghamshire HP18 0TL See map Help us to improve this page. Give us your feedback in this 2-minute survey .. Use Send Money to a Prisoner (GOV.UK) for funds — cash not accepted.

Country-wide mail rules

  • · Cash not accepted — use Send Money to a Prisoner (free, GOV.UK).
  • · Paper letters only; no laminated photos, polaroids, stickers, glitter.
  • · Books direct from a reputable retailer (e.g. Amazon, Foyles) are accepted in most prisons.
  • · Legal mail (Rule 39) is confidential between counsel and inmate.

Send money (GBP (£))

Phone calls

  • · PIN-phone system in cells (most prisons since 2021): inmate calls a pre-approved number list.
  • · Inmate buys credit from their canteen account.
  • · Most calls are recorded and may be listened to.
  • · Legal calls to numbered exempt-list lines are unmonitored.

This prison's general number: 01296 445 243(administrative — you cannot speak to inmates this way)

Visiting

Book a visit: Prison Visits Booking — GOV.UK

Book online; allow at least 7 days. Free to family.

This prison's visiting rules

Visits booked online via the GOV.UK Prison Visits Booking service. Photo ID required. Visit frequency varies by the inmate's IEP level.

Country-wide visiting rules

  • · Government photo ID required on arrival.
  • · Dress code: no head coverings (except religious), no overly revealing clothing.
  • · Children under 18 must be on the inmate's approved visitor list and accompanied.
  • · Arrive 20 minutes early for processing. Visits typically 1–2 hours.

Send an email to an inmate

  • Email a Prisoner

    Pay per message; the prison prints it and delivers in the inmate's daily post.

First-visit checklist

  • Government photo ID (driving licence, passport, blue-badge)
  • Visit confirmation reference (email)
  • Coins for the visitor-centre locker and refreshments
  • Plain clothing — leave belts, jewellery, sunglasses in the locker
  • No phone in the visits hall; leave in the locker

Legal aid

Helpful to know

  • · Assisted Prison Visits Unit (apvu.homeoffice.gov.uk) reimburses travel for visitors on a low income.
  • · Pact (Prison Advice and Care Trust) runs visitor centres at many prisons and offers practical support.

Important

This toolkit aggregates publicly available guidance. Rules vary by facility and change over time — always confirm with the prison's official contact channels before sending mail, money, or attempting a visit.