There are many services that allow you to keep up-to-date with developments in your chosen field. Below are a few you might want to consider using:

• Courts and Tribunals Judiciary has a Daily Digest Bulletin you can subscribe to which provides updates to judgments from multiple categories.
• House of Commons Library provides various research alerts and current awareness bulletins to help you keep up-to-date.  
• Westlaw allows you to receive alerts to new content added to the platform. Wherever you are on Westlaw, if you see the bell icon, you can setup an alert for new developments to that content for example; a search or topic, case, legislation or journals. You can then mange your alerts in the alert area which can be found next to your account page.