---
type: restriction
id: royal-mail-post-office-flammable-solids
asset: shipping-restrictions-by-class
title: "Flammable solids — Postal shipping restrictions by item category"
sources:
  - https://www.postoffice.co.uk/mail/what-can-i-send
source_quote: "UK – not allowed in the mail"
generated: true
harvested: 2026-08-03
stale_after: 2027-08-03
item_category: "Flammable solids"
carrier: "Royal Mail / Post Office"
restriction_type: "prohibited"
scope: "UK"
conditions: "not allowed in the mail"
verified: false
unverified_fields: carrier, item_category
---
**Item category:** Flammable solids

**Carrier:** Royal Mail / Post Office

**Restriction type:** prohibited

**Scope:** UK

**Conditions:** not allowed in the mail

> UK – not allowed in the mail

Source: <https://www.postoffice.co.uk/mail/what-can-i-send>