When traveling from Paris to London on the Eurostar, passengers must navigate specific border formalities. Initially, passport control occurs at the Eurostar terminal in Paris, where both French and UK border control agents are present. As you leave France, you will go through French border checks first, followed by UK border checks. This means travelers do encounter border control personnel when departing France, ensuring compliance with exiting regulations.

Regarding the entry into the UK, all border control formalities take place at the Eurostar station in Paris before departure. Upon arrival in London, specifically at St Pancras International—where the Eurostar trains arrive—there are no further UK border checks. However, UK customs officers may carry out random checks upon arrival.

For detailed travel requirements, including necessary travel documents and identification, you can consult the Eurostar travel information links such as Check Travel Requirements for UK-EU Trips and Customs Information | Eurostar. To allow ample time for these checks, it is advisable to arrive early at the station, which you can find more about on the When to arrive at the station | Eurostar page.

In summary, border formalities for Eurostar travelers from Paris to London include checks conducted in Paris before boarding, ensuring a smooth entry into the UK upon arrival at St Pancras International.

Sources

Check Travel Requirements for UK-EU Trips - EurostarCustoms Information | EurostarUS citizens - London to Paris for a day via Eurostar in March 2025When to arrive at the station | EurostarEurostar to/from London check-in procedure. - Rail Europe HelpEUROSTAR TRAINS EXPLAINED | London to Paris from £78 rtnInformation on your trip - Eurostar

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