Data concerning the average time taken to complete a disclosure by police force area are not a performance target and are not collated by the Criminal Records Bureau (CRB).
The CRB operates to a set of published service standards (PSS) which include to issue 90 per cent. of Standard Disclosures within 10 days and 90 per cent. of enhanced disclosures within 28-days.
Average figures do not give an accurate indication of performance, since any forces' performance can be affected by a number of factors; the volume of cases sent to a force to process in any given month, the number of staff available to process the checks and the IT resources on hand to forces. With these variables, performance can fluctuate within individual forces from one month to the next.
However, you may be interested to note that comparative police force performance data can be found on the CRB website at:
www.crb.gov.uk.