The earliest glass in the Cathedral dates back to the 1330s. During the Civil War of the 1640s, many of the windows were smashed, although the shards were retained and gradually reassembled.
Thankfully, the stained glass in the Presbytery was too high up to be easily destroyed and this remains a significant example of late-medieval glass painting and design.
However, much of the glass had corroded, resulting in a loss of the painted detail. In many places, the joints and surrounding stonework have also corroded and some of the glass segments have already fallen out.
An extensive conservation programme began in 2016 to restore the glass to its former colourful beauty and renew the surrounding stonework of nine unique medieval glass windows in the Presbytery at Clerestory Level.
Holy Well Glass were appointed to work on the glass conservation and eight windows were worked on off-site. The ninth window, the East Window, was worked on in-situ. The Cathedral stonemasons restored the stone tracery using stone from Caen, France.
Overall, the project took three years to complete and visitors can now enjoy the stunning results when they visit the Presbytery.