Lots of worms (lumbricus terrestris - rather than composting/tiger worms), small stones, organic matter and horticultural grit should help. You could sow a load of clover or similar to add hummus to the soil and help drainage.
That’s good to know - we’ve found loads of monster worms on the plot so hopefully now that it’ll be grown on properly rather than being somewhere to bury rubbish, the soil will improve
Lots of worms (lumbricus terrestris - rather than composting/tiger worms), small stones, organic matter and horticultural grit should help. You could sow a load of clover or similar to add hummus to the soil and help drainage.