Myself and Jetwash have been having issues with the PilotPlus version of London Oxford Kiddlington EGTK.
Jetwash identified the problem of no visible runway markings and Taxiway markings, it is linked to Navigraph. Jetwash did as was advised by ORBX and renamed his Community folder, create a new one with only London Oxford Kiddlington EGTK, and sure enough it worked. After adding files the only one that took the scenery back to the original issue was Navigraph. We both have Navigraph subscriptions.
If you are using Navigraph subscription and have London Oxford Kiddlington EGTK can you please report back here if you have an issue with runway markings and Taxi way markings, or perhaps as important if you do not.
Thank you