Crizzling refers to a defect that threatens the integrity of stained glass in churches and other buildings.
Click here to read about the investigation of crizzling in the important stained glass in St John's church and the steps taken to preserve the glass for the future. The article includes several photographs of the beautiful windows.
The church is Grade-1 listed and has many interesting features. It is well worth a visit.
Thanks to Simon and Gill Littlejohn for this interesting article.