Bland-Altman plots showing the limits of agreement between the numbers of horses per postcode area and by region in the NED owner and Stakeholder horse datasets. These plots assume a relationship between the mean number of horses and the difference in the number of horses in each postcode area or region. The plots illustrate the agreement between the relative percentages of horses in each postcode area/region in the Stakeholder horse and the NED owner data. The owner location data provided by the NED has been restricted to include only those horses less than 30 years old. There are comparatively fewer horses in the Stakeholder horse dataset compared to the NED owner dataset in Dartford (DA) and London. Scotland appears to have comparatively greater numbers of horses in the Stakeholder horse dataset compared to the NED owner dataset.