UK Passport Rules: What Australians with British Dual Citizenship Need to Know (2026)

Heads up, Australians with dual British citizenship: travel to the UK just got a whole lot trickier!

For years, if you held both Australian and British passports, you could choose which one to use when visiting the UK. But that's changing, and it's essential to understand these new rules.

Previously, those with British or Irish citizenship enjoyed the flexibility of using either passport when flying into the UK.

Starting next month, however, the rules are tightening. Dual citizens will be expected to use their British passport when entering the UK.

Let's break down what you need to know, including the potential costs involved.

So, what's changing with British passport rules?

Under UK law, anyone with British or Irish citizenship has an automatic right to enter, live, and work in the UK, bypassing the usual immigration process. This has been the case for quite some time.

Historically, dual citizens from countries like Australia, New Zealand, and Canada (which don't require a visa to enter the UK) could travel using their other passport. They would simply undergo some checks at border control to confirm their British or Irish citizenship.

But here's where it gets controversial... From February 25th of this year, the UK's Home Office will begin enforcing new pre-departure checks linked to its electronic travel authorization (ETA) system.

The ETA, introduced gradually since 2023, is a digital screening process for visitors from visa-exempt countries.

And this is the part most people miss... British and Irish dual citizens are not eligible for an ETA. This means they must travel using their British or Irish passport, or possess a certificate of entitlement in their other passport.

What does this mean for dual citizens?

If you're a British dual citizen, you now have three options for entering the UK:

  1. Renounce your British citizenship.
  2. Present a valid British passport.
  3. Show a certificate of entitlement of the right of abode (an official document attached to your non-British passport).

However, obtaining a certificate of entitlement is significantly more expensive (around $1,182 AUD) compared to the cost of a new British passport (around $190 AUD for adults).

If you need to travel urgently before February 24th, you may be able to apply for an emergency travel document, provided you hold a valid passport from a non-visa national country.

While there's no official data on the exact number of Australian-British dual citizens in Australia, these changes are likely to impact tens of thousands of people.

To put things in perspective, the Department of Home Affairs reported that 12,674 people from the UK became Australian citizens last year. The ABS also indicates that around 964,000 people born in England currently reside in Australia, though this figure includes those on temporary visas.

How will the new ETA system affect Australian citizens?

If you're an Australian heading to the UK for a holiday or work trip, you'll need to complete an ETA application before you travel. This is a digital permit system, similar to the one used in the US.

You can apply online or through an app. The ETA costs £10 (around $20 AUD) and is valid for two years. You should apply for the ETA at least three days before your travel date.

Even if you're transiting through the UK (meaning you're not going through border control), you'll still need to apply for an ETA.

Why the change?

A House of Commons research briefing explained that airlines wouldn't know a British dual national was exempt from immigration control if they only booked a flight using their non-British passport.

While there's no specific legal requirement for British citizens to use a British passport, pre-departure checks make it difficult to travel without one.

Airlines are now required to verify that passengers have obtained an ETA before boarding. If a passenger can't provide sufficient evidence of their eligibility to enter the UK, they may be denied boarding, due to potential fines for the airline.

The briefing also noted that British dual citizens have been advised to use their British passport for many months, but the transitional arrangements are set to end in early 2026.

What are your thoughts on these new rules? Do you think they are fair, or do they create unnecessary complications? Share your opinions in the comments below!

UK Passport Rules: What Australians with British Dual Citizenship Need to Know (2026)

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