In the UK the Air Navigation Order definitely does not specify what is acceptable or not in terms of VFR navigation. I can't remember the exact wording and cba to look it up but its something like, "shall carry maps, charts and codes suitable for the intended flight and any anticipated diversion".
It definitely does not say, for example, that carrying the latest half mil chart is a requirement.
The point being that as PIC you are responsible for deciding how you will navigate, stay safe and not infringe CAS. When you bust somebody's control zone that isn't on your chart it is not a defence to say, "But your Honour, I was using the latest official chart and it isn't marked".
Any chart or gps update is out of date as soon as it is issued. You have to check official sources like AIS for updates. So for your chart to be up to date it will have loads of pencil marks showing the changes that you have made to it. how you do that on a gps moving map between updates I don't know.