Hi Eddie, hope you are ok. I will DM you to check in as not heard from you for a while and really keen to help you with your running.
Coach Simon🍊
Maintaining your current 5k pace will get progressively more challenging as a session unfolds. So breaking it down in this nature should allow you to maintain that pace for the whole session.
If you have accurate heart rate data that is far and away the best guide for this run. Stay in Zone 2 if you can.