All of which illustrates nicely why GA isn't meaningfully part of the transport infrastructure in the UK (unlike the US) - if you can't rely on an airfield being open for the published hours, or use it out of hours without jumping through hoops...
The biggest obstacles to GA being a meaningful part of the transport infrastructure in the UK are firstly the bstard uk weather, secondly insufficient geographically scattered airfields, and thirdly getting from the airfield to your ultimate destination.
Jetpacks and roller skates are the answer.