Plans to drill for oil near Billingshurst in West Sussex needs a fresh planning application because the exploration target has changed, campaigners said this week.
People can now comment on new details of plans to produce oil for 20 years at Markwells Wood in the South Downs National Park.
The largest holder of oil and gas acreage in south-east England is seeking to add to its assets.
West Sussex County Council has approved changes to plans by UK Oil and Gas Investments plc for its exploratory oil well at Broadford Bridge, near Billingshurst.
The company behind the Brockham oil well in Surrey has bought into the neighbouring licence where there are plans for exploratory drilling this year.
Planners in the South Downs have demanded more information on the effects of plans to drill new wells and produce oil for 20 years.
UK Oil & Gas Investments has announced it plans to drill an exploratory oil well at Broadford Bridge, near Billingshurst, in the first half of next year.