Most medieval cathedrals in Britain have a ground plan that is essentially a Latin cross. There are additions to this basic shape in the form of cloisters, chapter house etc, but in essence the footprint of the building is a Latin cross with the shorter head (the chancel) at the east, the longer nave at the west, and the north and south transepts making the two "arms". The point where the transepts meet is called the crossing and above this point (usually) is the cathedral's biggest tower - the crossing tower. Such is the plan at Hereford. Today's photograph shows the view from the north transept looking across the crossing to the south transept.
photo © T. Boughen Camera: Nikon D5300