I have been on holiday with the family in a not exactly sunny, but still perfectly pleasant Bilbao, and so have not replied to this as soon as I probably should have.
But thanks to Damian Counsell (@PootBlog) who responded to my annoying twittering by explaining one of the magnetism issues I had:
I have to say, though, I am less than convinced. Say I create a new permanent magnet. How do other magnets know about it? In other words how does this “field” propagate? As it carries information it must surely propagate at the speed of light – but how? Is it a property of space-time itself?