More than 50,000 cards are expected to be handed out to foreign nationals from outside Europe between November and March as they extend their visas and register marriages or civil partnerships.
From next year ID cards will be given first to those in security-sensitive roles and by 2010 the aim will be to encourage young people to enrol. They will not be compulsory for the general population.
The size of a credit card, each ID card bears a digital image of the holder, their name, the place and date of the card's issue, a signature and a unique identity number. For foreign nationals there is also a "type of permit" section showing the person's visa category as well as a "valid until" date showing how long the holder has permission to stay in the UK.
On the reverse, the card carries an electronic chip recording biometric details including fingerprints. The holder's gender, date and place of birth and nationality are recorded above a section entitled Remarks that lists entitlements.
