UK most borrowed titles against different regions in 2014
Every year Public Lending Right release data on the most popular books and authors in UK libraries. This data is made up from select contributing authorities. There is a system for accessing PLR data (LEWIS), but only accessible with a qualifying library account.
The data released in PDF form is available to be used and made widely available (giving acknowledgement of the original source, which is PLR). Here is the 2014 data for the regional top 100 titles in searchable and sortable tables.