The summit of Chapel Hill is protected by a weak peripheral bank, giving it the character of a defended hilltop (0.38ha, 0.95acres). For the most part the bank has an internal height of just 0.4m, whilst externally it measures 1.4m. Despite its apparently insubstantial nature, where investigated the bank has been found to contain a large amount of stone.


At the eastern end, where Gerhard Bersu's excavations were focussed in 1944-45 - with the original intention of investigating the supposed hillfort - two pairs of large, rock-cut postholes were discovered, leading to the belief that there was, in fact, an entrance of some kind at this point. No finds have been made of Iron or late Bronze Age date to confirm that the hilltop actually served as a hilltop refuge in either of those periods.


The bank is especially weak at the western end, perhaps indicating another entrance centred at SC2462068190. A short earthwork extends approximately 10m in a SSW direction beyond the enclosing bank from a point south of the chapel at SC2463068154, though whether this is intended as some kind of defensive outwork or a boundary is not clear.