The Practice Level Prescribing series has transferred to the NHS Business Services Authority (BSA). They are releasing a new dataset from April 2020 that combines elements of, and is intended to replace, the Detailed Prescribing Information (DPI) data previously released by NHS Business Services Authority (NHSBSA) via the Information Services Portal (ISP), and the Practice Level Prescribing in England (PLP) data released by NHS Digital via this website.
The data is available at the link provided in the Resources section at the bottom of the page.