Introduction:
I created KML files from World Update III: UK which include 122 POIs and the 5 new airports I found here:
https://forums.flightsimulator.com/t/release-release-notes-1-13-16-0-world-update-iii-united-kingdom-now-available/365854 

Description:
Inside the zip you will find 6 KML files and 5 flight plans.
KMLs:
- FS2020_UK_World_Update_III.kml  (122 POIs)
- EGFF to EGFF.kml
- EGGP to EGPH.kml
- EGHQ to EGRO.kml
- EINN to EGAC.kml
- EGLC to EGLC.kml

Flight plans:
- VFR Cardiff (EGFF) to Cardiff (EGFF).pln
- VFR Liverpool (EGGP) to Edinburgh (EGPH).pln
- VFR St Mawgan AB (EGHQ) to Roche Barton Farm Airstrip (EGRO).pln
- VFR Shannon (EINN) to Belfast City (EGAC).pln
- VFR London City (EGLC) to London City (EGLC).pln

I added some fligh plans but you can create your own around the UK POIs if you add the FS2020_UK_World_Update_III.kml  in LittleNavMap from the menu File/AddGoogleEarth KM.

PlanestIsCalling will out very soon !!
I uploaded on youtube a small video who explain how I created with PlanetIsCalling (PIC)  the kml flight plans from LittleNavMap. 
https://www.youtube.com/watch?v=RGh5TK1Ex2I

In short PIC provide information one more than half million of Points of interest that you can see within the application or land them on Google Earth from flight plans, ICAOs, Weather Cities and airports, Airport cities, Country cities, High Peaks and Volcanos from all around the World!

To follow the development I will post the evolution here and if you have questions please let me know here:
Discord : https://discord.gg/DjJWFAZ2

Installation:
Unzip FS2020_UK_World_Update_III.zip and put the files in your the folders as you like :)