The general guidance document gives an overview of GDPR.
HR audit document will help you with your data audit (you can also adapt the same format for a full data audit across the business).
The GDPR Compliance Toolkit includes:
Sample Employee privacy statement template
Sample GDPR project tool
Data Consent form for clients template
Consent form for candidates template
Consent form for suppliers template
Subject Access Request form template
Notification of personal data breach template
GDPR online training course