Picture posting is enabled for all :)
Personally would creosote, disregarding all doom mongers
How do you define a "Raised bed"?Personally anything under 12" is not a raised bed to me, and to surround any thing below this height in timber is an unecessary expense!
I like your "headstones" If these were "footstones" as well, line wires would support polythene, fleece or debris netting, giving very versatile growing protection to all manner of crops
Looking for them to be about 3ft high thanks everyone lots to digest :)