This has been discussed a lot on here already. My understanding is that as long as you file a flight plan and stick to it, most operations will be largely unaffected in all but the small fully restricted area in the centre of London.
There has already been huge accommodation by the CAA for GA compared to the initial proposals, including a simplified free system to file the flight plans (Sky Demon Light). The CAA have spent a lot of time and energy raising awareness of the changes, for which they should be applauded.
What more are you looking for from them? I think this boat has already sailed.