I've scoped out parts at my local wickes and I've found timber in the right dimensions - it's tall, fairly thin legs I'll be making. I think provided I can make the board/supports stable without compromising the beams, in theory it should work
I'm adding insulation to my loft (200mm over an existing 6") and want to put stilts in now so that when I board on top of the insulation in the future, I won't have to poke around in the (fibreglass) insulation.
But I'm doing the job on a budget.
I was looking at loft legs or similar, but...