Here's some analysis - feel free to download the data and do your own too.
1. To get an idea of the variation between Jobcentres, I did a scatter plot
This shows that highest sanction referral rates are found in some smaller Jobcentres. A few of the lowest rates are in this group too. Large Jobcentres are very middle of the road.
2. Suspecting something "unnatural" about this chart, I sorted by sanction referral rates and plotted a histogram
- Slopes are pronounced at around 4% and 8%. This suggests that JCP is monitoring the statistics and paying closer attention to offices outside the 4-8% range. There might even be an internal understanding that 4-8% is OK
- The lack of any offices with less than 2.5% might be an indication of a mandatory target to exceed this figure
- Again, there are some high rate outliers.
Finally, for a different take on sanction geography, see Geographical Variations in JSA Sanctions and Disallowances by Dr David Webster. This has some interesting work on the correlation between sanctions and local unemployment rate. It's also where I found the link to claimant count data :-)