Ms Caren Gallagher:

We break down the data to local electoral area. The reason for that is in terms of the methodology for the rent index. When it gets down to that level, it is based on new tenancies. When we get down to that level, we are dealing with a small number of observations and the level is set at 30 observations. An observation is the data on the tenancy and the rental amount. That is the level below which we would redact this because, below that, it is very difficult to stand over a standardised average rent calculated on anything less than 30 observations.