PGDs for national immunisation and vaccination programmes which are commissioned by NHS England can be found on the NHSE website for Kent, Surrey & Sussex:

NHS England — South East » South East Patient Group Direction downloads

NHS England are responsible for the production and on-going maintenance of these PGDs.
Queries in relation to PGD content and availability should be directed to the Screening & Immunisation Team: england.surreysussexsit@nhs.net
A further "Immunisations and Vaccination Queries Guide" is also provided below. This guide signposts to a number of useful contacts for queries.

Vaccine / immunisation information is available in the Green Book (link below)

The majority of vaccinations / immunisations for the National Immunisation Programmes are available free of charge via ImmForm. Reimbursement for vaccines obtained in this manner must not be claimed via FP34 or FP10. If in doubt please refer to our Vaccine Claim / Payment Guide for Practices - available below.