Originally Posted by ID Cards Act

Personal information

1 The following may be recorded in an individual’s entry in the Register—

(a) his full name;

(b) other names by which he is or has been known;

(c) his date of birth;

(d) his place of birth;

(e) his gender;

(f) the address of his principal place of residence in the United Kingdom;

(g) the address of every other place in the United Kingdom or elsewhere where he has a place of residence.
Identifying information

2 The following may be recorded in an individual’s entry in the Register—

(a) a photograph of his head and shoulders (showing the features of the face);

(b) his signature;

(c) his fingerprints;

(d) other biometric information about him.
Residential status

3 The following may be recorded in an individual’s entry in the Register—

(a) his nationality;

(b) his entitlement to remain in the United Kingdom;

(c) where that entitlement derives from a grant of leave to enter or remain in the United Kingdom, the terms and conditions of that leave.
Personal reference numbers etc.

4 (1) The following may be recorded in an individual’s entry in the Register—

(a) his National Identity Registration Number;

(b) the number of any ID card issued to him;

(c) any national insurance number allocated to him;

(d) the number of any immigration document relating to him;

(e) the number of any United Kingdom passport (within the meaning of the Immigration Act 1971 (c. 77)) that has been issued to him;
etc.