This in from Highways England.....

 The winning contractors for our archaeology and preliminary works have been announced. 

To make sure the project is ready to move on if we get the green light in November, the contracts have been awarded ahead of the decision to enable the two successful companies to start pre-planning their work. 

They are not expected to start on-site until late spring 2021.

Read more on this site: 

https://highwaysengland.co.uk/our-work/a303-stonehenge/latest-news/a303-stonehenge-contractors-named/

And I have it on good authority that the public will be able to don a hard hat and get involved...this Geek can't wait and it looks like we wear BLUE!!

However.....there are a few rules to wearing hard hats: https://www.hsepeople.com/dont-wear-hoodies-hard-hat/  and I gather granny's knitted beanie under your hard hat wouldn't be allowed either....especially one with a pom pom!