Thank you for your answer. I checked the tiles. the folder +50+000 was there but the file +51+001 was not. There were other files missing as well.
To "solve" the situation, I unchecked Europe, in less than 5 seconds the installer told me the scenery had been uninstalled. Then I selected Europe again. The installer told me I needed 6+ GB free to install the scenery. I accepted and went on. Unfortunately my internet connection is so bad so I let it work over night. When I woke up the installer had been interrupted and it didn't give me any option to continue so I had to close everything.
I restarted the sim and I finally have EGLL but I am assuming I have the same problem in other areas because I can see that most folders go from 320mb to 800+ data while I have some which only have -10mb
I know Laminar Research clearly states that in order to buy the digital edition, a reliable internet connection is a must. But I wish there were other options to download the scenery package like a torrent.
Anyways thank you again for your help.
Raff