[DTV]

Personally I'm not sure what the benefit of extending Breakfast to 9.30am would really be.  On the BBC News (channel) and BBC Two currently a simulcast of 5Live commences at 9am.  Therefore 'UK only' content is already being shown on the News channel, so it wouldn't make any difference to any quotas.

It's not really about benefits to the News channel, but benefits to BBC One. Extending these news programmes (and possibly Morning Live as well) allows them to cut out other daytime slots and reduce the overall daytime commissioning budget, while also not upping the amount of repeats (actually increasing the number of original minutes). At a time of severe BBC budget cuts and the associated recalibration towards online-first, daytime is a bit of an issue as it is a sizeable portion of BBC One's programming budget, but with limited streaming value. This ensures that daytime TV can continue relatively unscathed, but meeting budget cuts.