You are British and Canadian, so you travel with two passports. Carry both, every day. Show the one named here.
When
Where
Show
The flight out Canada to London
Check in and board Heathrow: arrival and eGates
UK UK
The Eurostar at St Pancras
First desk: leaving the UK Second desk: entering Europe
UK Canadian
The weeks in Europe
Any passport check anywhere in Europe
Canadian
The flight back from Spain
Passport desk leaving Spain Airline check-in and boarding Arrival in London
Canadian UK UK
The flight home London to Canada
Heathrow: check in and board Arrival in Canada
Canadian Canadian
Rule of thumb: UK passport for the UK. Canadian passport for Canada and for Europe.
Why it works this way
The UK: British citizens must fly into the UK on a UK passport (airlines check this since Feb 25 2026). With it you need no UK travel permit (ETA).
Europe: either passport is allowed, but use the same one going in and coming out. Europe's new Entry/Exit System records the passport you enter with and expects it when you leave. The first time in (at St Pancras) they take a quick fingerprint and photo. That is normal.
Canada: Canadian citizens must fly home on a Canadian passport.
If a desk asks for the other passport, show it. Rules can change; this was checked on Oct 7 2026.
2Your phone in Europe: Roamless
Roamless is one eSIM for the whole trip. It works in every country you visit, so there is no new SIM at each border. You have $40 of credit loaded, pay as you go: data draws down the credit, and you can top up in the Roamless app. Leftover credit does not expire.
When you land in London
Open Settings, tap Cellular, then Cellular Data.
Tick Roamless instead of Canada.
On the same screen, turn Allow Cellular Data Switching off.
Go back to Cellular. Under SIMs, tap Roamless and turn Data Roaming on.
Under SIMs, tap Canada and turn Data Roaming off. That stops your Canadian carrier charging for data abroad.
That's it for the whole trip. Nothing to change at the borders.
Calls: use WhatsApp, FaceTime or iMessage. They run on Roamless data. A normal call on your Canada number can cost extra.
Flying home
Settings, Cellular, Cellular Data: tick Canada.
Optional: under SIMs, tap Roamless and turn the line off.
Check your credit any time in the Roamless app.
3Trains: which code do I show?
Your Interrail pass is in the Rail Planner app. Every train goes on the pass first. Some trains also need a booked seat.
Every train, every time
Before boarding: Rail Planner, My Trip. Find the train and switch it on, so it is added to your pass.
On board: My Pass, then Show ticket. That QR code is what the conductor scans.
Once a day: open Rail Planner with signal or wifi. After 24 hours offline the pass stops working until it reconnects.
Pass QR only: no booking, no extra cost
Train
When
Munich to Innsbruck
travel day
Nice to Marseille, local train
travel day
Riviera day trips by local train (Cannes, Antibes, Monaco, Menton)
any day
Local trains in cities: Munich S-Bahn, Barcelona Rodalies, Madrid Cercanías
any day
UK trains: Nottingham, Leicester, the Elizabeth line. The ticket gates cannot read the pass: show it to the staff at the wide gate.
end of the trip
Pass QR plus a booked seat: add it to the pass, then show both
Train
What to show or book
Eurostar, London to Brussels booked
Eurostar QR (in the app's Tickets) and the pass
Brussels to Cologne to Munich booked
Eurostar QR, then the ICE seat (no code: show the PDF), and the pass
Innsbruck to Verona to book
Supplement about €10 to €15 (€5 more if bought on board)
Verona to Milan, fast train to book
About €13, or take a regional train with no booking
Milan to Ventimiglia to book
Intercity seat about €3
Marseille to Barcelona to book
About €25. Few pass seats: book soon
Barcelona to Madrid to book
About €10 (Renfe AVE or iryo)
Not on the pass: buy a ticket
Metro, trams and buses in every city, including the London Underground: tap a contactless card.
Heathrow Express, and the Italo, OUIGO and Avlo trains.
Any train before the pass starts or after it ends: the pass is not active yet, or has ended.
Always carry the passport whose number is on the pass (the real one, not a photo) and a charged phone. Booked seats appear in the trip app's Tickets once Brad adds them. Your travel days are in the trip app.
Checked Oct 7 2026 against UK, Canadian and EU government guidance, Roamless's iPhone setup guide, and Interrail's conditions of use and help pages.
Roamless instead of 
Canada.