The Farmer's Dog in Asthall opened its doors in the summer of last year after refurbishments and renovations, as chronicled in hit Amazon Prime series Clarkson's Farm.
Previously known as The Windmill, the boozer near Burford was bought by Mr Clarkson for around £1,000,000.
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It has proved a hit with the punters as large numbers of tourists have come week-on-week to enjoy a pint of Hawkstone with the stunning surrounding views.
Up to now, Mr Clarkson has been encouraging visitors unable to park on site, to park at a nearby field owned by local landowners Edward and Patricia Walker, which he leases.
Jeremy Clarkson's Cotswold pub (Image: NQ)
However, the Daily Mail reports that its proximity to Asthall Burrow - a 1,400-year-old burial ground - has meant he has had to install a new 100,000 square foot reinforced metal car park surface there.
When the former Top Gear star applied for retrospective planning permission to use the field as an overflow car park, that reportedly triggered a geophysical survey.
During this survey, an archaeological team found remains perhaps linked to the barrow, which is listed by Historic England.
As such Mr Clarkson has had to hire and put in the metal covering, in order to continue using the field as an overflow car park.
This comes as the former Top Gear host waits to see if his planning application to formalise the staff car park and additional customer parking at The Farmer's Dog is approved by West Oxfordshire District Council.