Just to update in-case anyone else experiences the same.
Autodesk support informed me that the time stated in the email is in accordance with the time zone of the project settings. An oversight in my opinion.
So in my case, as Autodesk guidance, I now have to set the time zone of my project to reflect where the main users reside, instead of the project location. This is within the Project Admin - Settings. This is surely incorrect behaviour. The project settings should resemble the project location!
Note, that this will still be incorrect for users in different timezones. The whole point of ACC is collaboration, but Autodesk didn't account for multiple timezones on a project.
Also note, that this is not documented in help, and the tooltip is incorrect.