PPS 17 Control of Outdoor Advertisements·Page 17·Annex A, paragraph 5
Poster Panel Displays in the Countryside
Poster panel displays are generally unacceptable in the countryside, except where they advertise a specific time-limited event such as a local agricultural show or fair.
Poster panel displays are out of place in the countryside and will generally be unacceptable. An exception may be made where the display advertises a particular event, such as a local agricultural show or fair, and is restricted to a specified time period.
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/PPS 17 - Control of Outdoor Advertisements.pdf