A new tunnel bypassing Stonehenge could destroy a “unique” site where traces of humans living as far back as the last Ice Age have been preserved, experts have warned.

Hoof prints of wild cattle known as aurochs were recently discovered at excavations a mile and a half from the famous stone circle in Wiltshire, University of Buckingham archaeologist David Jacques said.

The 6,000-year-old marks, preserved in what appears to be a ritualistic manner, are the latest finds of a decade-long dig at Blick Mead, which Prof Jacques said form a "national archive of British history".

However, the proposed tunnel and a flyover close to Blick Mead, which could be built under Government-backed roadwork plans to ease congestion on the A303, could irrevocably damage the site, he warned.

Opponents of the plan fear it could harm the rich archaeological landscape.

Mr Jacques said impacts on the Blick Mead site had not been assessed, despite it being the only place in Britain that can trace people living there since the end of the Ice Age, around 8,000 BC.

He also accused the Government and Highways England of “negligence or worse” for a map of the plans which he claims put Blick Mead in the wrong place and called for a halt to construction plans.

Professor Jacques said: “If Highways England and the Government can’t even locate Blick Mead in the right place how can we trust anything in this process?

“The Stonehenge world heritage site landscape is unutterably precious and you tamper with it at your peril – you cannot make it come back.

“The tunnel scheme will clearly compromise the archaeology.”

New carbon-dating results of the latest hoof prints uncovered at the site reveal they are more than 6,000 years old.

David Bullock, Highways England project manager, said: “The document in question is a land ownership boundary plan.

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“The plan shows indicative general features and was never intended as a geographical map.

“We have just announced the start of statutory consultation on the A303 Stonehenge scheme and we welcome feedback from all interested parties during this process.

“This will help us to make sure we have got the best scheme, or highlight where we still need to make changes, before we make our application to build the scheme.”