metrorider
No your evidence is not out of date, but I don't think that this is actually the issue, as you are no longer a patient at your old GP's practice Maximus can no longer contact them for any additional information that they might want, only your new GP is able to answer their questions.
I would contact your new GP and ask them to speak to you when they receive the request, hopefully they will be willing to do this.
Gordon
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
