A scheme for a 20-metre high 4G phone mast will need a full official application due to concerns about its impact on a nearby 19th century listed building, Pembrokeshire planners have said.

Applicants Cornerstone – in a ‘Prior Notification’ application to Pembrokeshire County Council, gave notice for the mast and ancillary works scheme at Ty Mawr Farm, Station Road, Boncath.

The development would allow a shared rural network for two of the main phone operators to provide 4G connection, a report for planners said.

The Council’s Historic Environment Conservation Officer has objected to the proposal due to the impact on the Grade-II-listed 19th century Ty Mawr Lodge, just under 200 metres from the site.

“The proposal would be clearly visible along the track with intra-visible views of the monopole and lodge. It has been concluded that the proposed development would have a negative impact on the setting of the listed building in its current proposed location,” a report states.

The need for a prior approval, meaning a full application, was also raised by the Ministry of Defence as the site falls within an area within which military aircraft may conduct low-level flight training.

The report for planners concluded that prior approval is required for the scheme.