# Balloons filled with non-flammable gases — Postal shipping restrictions by item category

For Balloons filled with non-flammable gases, carrier is Royal Mail / Parcelforce; restriction type is restricted; scope is UK allowed with marking; not allowed on International Airmail routes; conditions is Not allowed on International Airmail routes; for UK destinations permitted but must be clearly marked NON-FLAMMABLE GAS on the outer packaging, otherwise carried by road or rail, recorded from its source on 2026-08-10.

- **Item category:** Balloons filled with non-flammable gases _(verified: appears in the quote below)_
- **Carrier:** Royal Mail / Parcelforce _(our reading, not quoted from the source)_
- **Restriction type:** restricted _(our reading, not quoted from the source)_
- **Scope:** UK allowed with marking; not allowed on International Airmail routes _(our reading, not quoted from the source)_
- **Conditions:** Not allowed on International Airmail routes; for UK destinations permitted but must be clearly marked NON-FLAMMABLE GAS on the outer packaging, otherwise carried by road or rail. _(verified: appears in the quote below)_

## What the source says

> Royal Mail - Balloons filled with non-flammable gases are not allowed on International Airmail routes. For UK destinations, balloons filled with non-flammable gases are permitted but these must be clearly marked on the outer packaging with the words NON-FLAMMABLE GAS.

## Source

- https://corporate.postoffice.co.uk/media/w5dlus1c/foia-response_foi2025_00179_appendix-d_rm-dangerous-goods-and-prohibited-and-restricted.pdf

Last verified: 2026-08-10. Review by: 2027-08-10.
Part of [Postal shipping restrictions by item category](https://referencesource.org/shipping-restrictions-by-class/).