I lived out at the University of Essex and went home (east London/Zone 6) to see friends/family occasionally. I found that was long af and it was only two trains. West London to Essex, Colchester...I don't even want to imagine. I mean, if you have 9AMs what's the point?
You have to factor in commute times and it's potential affect on energy levels/health, ability to attend class, ability to complete work on time, make friends, do social things, etc. They also have a tap-in service for lectures using your Registration Card, so if you're late and attendance is used for part of your grade that might be problematic etc. You might also get called in to talk to your course tutor/personal tutor/department head if your attendance is too low and you don't have a reason for it to be low (e.g. disability).
Personally, I wouldn't want to live at home and commute that distance. It doesn't seem logical and could put your chance of getting a good degree at risk.
I'd weigh up the pros and cons, and think very hard about this decision!