The game keeps trying to download an update file for Southeastern Highspeed: London - Faversham: version 1.004.000, but keeps failing upon installation. Gives PS5 error code CE-100009-0. Web searches have not been any help.
Not sure if it will help but I had that code with the German route yesterday I clicked the options button on the TSW 3 tile on the PS5 home screen selected manage game content uninstalled the route with the error code and reinstalled and seemed to do the trick for me.
you have 2 red buttons and 1 yellow below on your left. the red one without a lid goes up the pantograph and the red one with a lid goes up the shoes. depending on where you are you have one of those types of current. If you want to raise the pantograph press the red one without cover, and then the yellow below to confirm, you may have to press it 2 times. and for the shoes it is the same process but with the button with a cover. To find out what energy you are using, look above, it has cables, it is a pantograph. If you are driving and you are not sure, the high speed line (pantograph) is in km.h, the low speed line is in miles on the speedometer. It's harder to explain than to do, don't worry. luck
I removed the update as was showing an error. In game store said £29.99. So went to PS5 store and downloaded from there an it worked.