A few years back I floated the idea of a competition grouped by age, to design three new roadside entrance signs for the WHS, sponsored by whoever. It came to nought because the cash was unlikley to be found to even run the competition. If this competition idea was used re the Silbury signage as an outreach art project, it would be an EH exercise suggested to local schools to educate pupils about the monument and why it shouldn't be climbed.