United Kingdom British Passport : Series 21 (2006 — 2010) Biometric
The changes to British passports have been driven by the US rather than the EU. The US requires certain passport features for participation in its visa-waiver programme, which allows citizens of most developed countries to enter the US for business or recreation trips of up to 90 days without a visa. The US demands compliance with ICAO standards, but it also imposes more stringent photo requirements and biometric features. The new US requirements have been imposed on the UK via the EU: the US informed the EU of its demands, and the EU then incorporated them into its own passport standards.