I just wanted to thank you for your help and advice. I made a point of using Wi-fi rather than 4G where possible and I also switched off data when I wasn't using it. The results were much better.
You have normal and low awake time....so almost the only other possibility is radio signal. Or a rogue and sneaky app. Is location services on? That's usually what rogue apps interact with to cause bad drain. Just if that's the case, android o/s is usually real high. The last thing is screen brightness...if its real bright it will drain fast.
Try WiFi.....then look at those other options I said.
Good luck! 👍