The Health Service (Control of Patient Information) Regulations 2002 No. 1438

THE SCHEDULE General Provisions

4.  The processing of confidential patient information for medical purposes from more than one source with a view to—

(a) linking information from more than one of those sources;

(b) validating the quality or completeness of—

(i) confidential patient information, or

(ii) data derived from such information;

(c) avoiding the impairment of the quality of data derived from confidential patient information by incorrect linkage or the unintentional inclusion of the same information more than once.