On the other hand, if this change is brought in at all, it could be very useful to create reasonably sized extensions within the new size range, which have been refused before. Alternatively it might be used as a bargaining tool on increasing relative sizes of replacement dwellings and proportion of garden take etc..
Related to this, another government 'initiative' being mooted is to penalise planning departments that are performing poorly on speed and quality.
Whether these are brought in or not, I think the greatest help might be more about the signals the government is sending to local planning departments both to approve more development and to speed decision making.
So, some more moves afoot to add to our armoury when negotiating with planning departments I feel or is this all 'pie in the sky' for yet another Government U turn when they get some 'real world' feed back from the people and professions at the sharp end of all this?