From Roader's Digest: The SABRE Wiki
Route: Patching - Goring-by-Sea
A road of much controversy and confusion over its classification, especially as it's only about two miles long. It did/does/will-maybe run from the A259/A2032 roundabout northwards to the A27's junction with the A280. Not currently deemed of good enough quality to be an A-road, it was scheduled to be straightened/widened as part of a new housing development in West Durrington, but this was met by objections by people who like the trees instead. It was signposted for some years after the construction of the A27/A280 junction, and possibly even classified, as the A2700, though this classification was then rescinded as a mistake. The current planning-application for the housing site does not include straightening/widening the road so much, so whether the classification will re-appear is uncertain.