I've noticed recently that my upload speed seems to be capped at around 78 mbps, previously I would get a consistent 110-120 mbps upload anytime I checked it. I've done the basics already, checking equipment, resetting the BT Smart Hub 2 etc
@Trunks91 welcome to the community and thanks for posting, I'm sorry to see you're not seeing the full upload speeds. The upload problem mentioned wouldn't be applicable to you as you're getting 78Mb and that's not a FTTP Hub profile.
Are you testing when connected via wireless or wired? Can you run a test using the MyBT speed tester you'll have to log in with your BT ID and the test will measure the network speed to your Hub?