Train line 'threat' to Banbury battle site
Campaigners have said it would be a "tragedy" if a rail line is built over a historic battlefield near Banbury.
In March, the previous government announced plans for a high-speed cross country link, which would go through the Battle of Edgcote site.
The government said this part of the route could not be changed because a nearby Roman Villa had to be protected.
Alan Lamb, of the English Tournament Society, said the site should be saved.
He added: "The Edgcote Valley is unique in the intensity of British history. It's like a catalogue of British history."
The society stages re-enactments of the Battle of Edgcote which took place in 1469, during the War of the Roses.
The high-speed rail link would run from Euston to Birmingham with interchange stations west of Paddington and near Birmingham airport.
Work is unlikely to start until 2017 at the earliest.