Thanks CG. I think I would get back ache with whatever way it worked, but there are pros and cons with all of them I think.
That shed has only just been built as a log store with 5mm gaps between the boarding. That was its first fill so we shall see how it gets on. We used to just toss logs into a 6' X 8' old shed and they dried out OK in there over a year. That lot was Monterey pine and was very sappy with loads of resin. It will probably burn too well. The cones certainly burned well

. Hopefully the log store will dry it out ok. We get a fair bit of wind here so hopefully it will be ok. If not I can always space the boards out a bit more as they are all screwed on for strength.