I'm not sure from a viewing figure point of view, but I've never really understood why GMB starts so early - I know I'm not a morning person, so perhaps that is a part of it but I think that a later start at 07:00 would perhaps start the show when more people are around to watch it.
The only part of GMB I am able to watch is the 6am-6:40am section due to the time I need to leave the house in order to start work at 8am. It's a selfish viewpoint to say that because you're not up to watch it, they should do away with it. I am never able to watch it between 8am and 8:30am but I'd never suggest they should get rid of that section of it because 'maybe it's just because I leave early, but I can't understand why GMB airs so late'. Lots of people are up and about between 6am and 7am, you can't just discount them.
To be honest, I couldn't care less when GMB started. If you read my post I said "perhaps that is a part of it", a reference to the fact that that may have a small influence on my judgment. My point was more centered around whether there are sufficient viewers to warrant the show to start at 06:00. A report by Sleep Cycle found that the average wake up time in Britain is 07:35, which again supports the idea that perhaps a later start to the program might maximize ratings for the show.
Of course, the best way to judge who watches the program is to take a look at viewing figures and weigh it up against the costs of starting earlier against the money they can make but unfortuently I don't have access to that data, so am speculating and coming up with a fantasy schedule.
For some reason, your post almost seems to take offense at even discussing the possibility of different hours for GMB - it's all a bit of fun and sort of the point of this thread? Perhaps fully read a post first before trying to create controversy?