The Information Commissioner’s Office (ICO) has published a guide to data protection which covers the Data Protection Act 2018 and the General Data Protection Regulation ((EU 2016/679)(GDPR))
The ICO states that it provides guidance for data protection officers and others who have day-to-day responsibility for data protection. It is aimed at small and medium-sized organisations, but it may be useful for larger organisations too.
You can find the guide here.