According to the proposal, fingerprints were preferred over iris scans because most EU countries already maintain extensive databases using fingerprint information, so that background checks on individuals would be a relatively simple process.
The report stated: "Larger capacity chips will be needed to hold the basic data and fingerprint image and more locations and additional staff will be needed to collect biometric data from adult applicants.
Biometric fingerprint and iris scans will be used for screening air passengers on Emirates and Cathay Pacific flights to and from Dubai and Hong Kong as part of a trial at London's Heathrow Airport. The passenger's fingerprint is then checked again...
From 2007 everyone applying for a new or renewal passport will pay the higher total fee of £85 and receive a separate compulsory ID card, containing either iris, facial or fingerprint biometric data, in addition to their passport.
A "route map to ID cards" has been outlined by the UK Passport Service (UKPS) that will see facial biometrics in passport books from 2005 and a second biometric - either a fingerprint or iris scan - on separate passport cards from 2006.
The manual check before security is then replaced by an automatic barrier activated by the passenger's fingerprint and a biometric reader verifies the passenger again at the boarding gate.silicon.com's A to Z of Biometrics