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DNA: Databases

Volume 498: debated on Monday 26 October 2009

To ask the Secretary of State for the Home Department what proportion of the records held on the National DNA Database relate to DNA samples taken by police forces in (a) Scotland, (b) England and Wales and (c) Northern Ireland. (294208)

Table 1 shows the number and proportion of all subject profiles retained on the national DNA Database (NDNAD) taken by police forces in Scotland, England and Wales (including British Transport police), and Northern Ireland as at 15 October 2009.

Table 2 shows the number and proportion of crime scene profiles retained on the NDNAD submitted by police forces in Scotland, England and Wales, and Northern Ireland as at 15 October 2009.

The number of subject profiles is not the same as the number of individuals. A proportion of DNA profiles held on the NDNAD are replicates, that is, a profile for a person has been loaded on more then one occasion (this may be because the person gave different names, or different versions of their name, on separate arrests, or because of upgrading of profiles). It is currently estimated that 13.8 per cent. of profiles held on the NDNAD are replicates. The replication rate of 13.8 per cent. should only be applied over the entire database however, as the replication rate for individual police forces varies considerably. The presence of these replicate profiles on the NDNAD does not impact on the effectiveness and integrity of the database.

Table 1

Force

Number of subject profiles as at 15 October 2009

Number of individuals (estimated)

Proportion of total subject profiles held on the NDNAD (percentage)

Scotland

271,693

4.6

England and Wales, inc. BTP

5,532,847

93.6

Northern Ireland

74,431

1.3

Other1

31,201

0.5

Total

5,910,172

5,094,568

100.0

1 For example, Guernsey police, Ministry of Defence police etc.

Table 2

Force

Number of crime scene profiles as at 15 October 2009

Proportion of crime scene profiles on the NDNAD (percentage)

Scotland

13,153

3.6

England and Wales, inc. BTP

351,367

95.6

Northern Ireland

1,753

0.5

Other1

1,262

0.3

Total

367,535

100

1 For example, Guernsey police, Ministry of Defence police etc.