<p>Electronic Travel Authorisations deliver important security benefits. A blanket exemption to the ETA requirement for passengers transiting airside would fundamentally undermine the rationale of the scheme by creating a permission free route of travel into the UK which would be open to abuse.</p><p>The process for obtaining an ETA is quick and light touch, and the cost (£10 per application) is minimal compared to the overall cost of international travel. An ETA will be valid for two years, or until the expiry of the passport used to apply, and can be used for multiple trips during this period.</p><p>We will keep our position under review to monitor the impact on transit as the scheme is rolled out.</p>