Above the Thornton brass is a sculpture designed by Stephen Cox.  It represents a broken Communion wafer and the meniscus of a cup of Communion wine.

high up on the back of the reredos, is a curious sculpture of two discs.  The top one, in Egyptian alabaster, represents a broken Communion wafer while the second, in Roman imperial porphyry, represents the meniscus (the flat surface) of a cup of Communion wine.  Both types of stone have been quarried for thousands of years in Egypt, first by the Pharaohs and then by the Romans, and so both are directly linked to the actual time and place of Christ’s earthly life.*

*From the Cathedral of St Nicholas guidebook.