# In through London, out through London

> London's gateways import six billion more than they export, most months.

- Category: Money
- Cadence: monthly
- Status: Published on a monthly cadence.
- Dataset key: `trade-balance`
- Source: [HMRC uktradeinfo](https://www.uktradeinfo.com/)
- Licence: Open Government Licence v3.0 — [terms](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)
- Canonical page: [https://londongraph.com/g/in-through-london-out-through-london](https://londongraph.com/g/in-through-london-out-through-london)
- Machine-readable record: [https://londongraph.com/data/in-through-london-out-through-london](https://londongraph.com/data/in-through-london-out-through-london)

## Methodology

Goods imports against exports through Heathrow, London and Tilbury, and London Gateway combined, monthly. A port-level trade gap is not a regional trade balance — goods landed at Heathrow are consumed everywhere — so read this as the flow through London rather than London's own account with the world.

## Visualisations

- [Trend](https://londongraph.com/g/in-through-london-out-through-london): London's gateways import six billion more than they export, most months.
- [Change](https://londongraph.com/g/in-through-london-out-through-london?view=change): Show the change from each preceding published period.

## Citation guidance

Attribute the original publisher named above and identify LondonGraph as the visualisation and methodology layer. Do not describe live values as a historical census, and do not present placeholder values as observations.