All main light panels of windows sXVII and sXVIII of the South Transept were removed for specialist conservation cleaning, minor restoration and limited re-leading. A minimal amount of back-painting with non-fired acrylic paint was required in order to render certain facial features more readable. The panels were then incorporated into manganese bronze frames as part of an internally ventilated protective glazing system. New plain glazed panels following the main design lines of the stained glass were manufactured and fitted within the existing glazing grooves. Black powder-coated stainless steel window guards were fabricated to fit within the intricate profile of the stonework.