Picture posting is enabled for all :)
I grow my butternut in amongst my sweetcorn. Plant them up in your sweetcorn block - before you put the sweetcorn in - at even spaces about 6 feet apart if you can (we start our sweetcorn in pots and will be putting them in within the next couple of weeks as they are getting too tall for the cold frame). We also pop 2 borlotti bean seeds in at the base of each sweetcorn plant.
Another tip is that to keep the crop manageable, the baby butternuts at about 2 inches long are really tasty cooked whole (skin-on) like a new potato!
I grow my butternut in amongst my sweetcorn. ...... was apparently an old native Mexican system that retained fertility in otherwise poor soil.