I've trawled the net and haven't found any reference to this specific type of situation. All I've found is stuff about home educating for part of each week, or stuff applicable to travellers which we're not (although we feel like it sometimes!). Has anyone done this? Pros and cons?
I also read about dual registration, but in our case one school would be in England/Wales and the other in Scotland and DC would be jumping between years, so I think perhaps not the best idea!