A 2-cell chapel, built as a single cell Norman chapel and extended west.
At the west end in the gable a 2-light opening to roughly pointed heads and a deep central mullion, to the south (river) front remains of a Norman door, but all the dressed work gone, and to right of this a square opening with chamfered surround, formerly with a mullion, also remains of priest's door, and to the right again a 2-light opening with mullion, all chamfered.