Working with data, using standards, GDPR compliance and publishing information according to predefined schema are all tasks for planning departments now.
We have published a guide to managing data in planning departments and the requirements of the UK GDPR. The guide also contains a template "privacy notice" for planning that councils may wish to refer to and localise.
Update at March 2021: This guide was difficult to make, and we want it to be as helpful as possible. We have released it as a consultation draft, to see how people find it and whether we need more mini case studies or whether we can consider it finished. We are holding some events to launch it and to see what our users say about it.