The mosaics covering the entire west wall of the nave portraying "The Ascension of Christ" were added by Salviati's Venice and Murano Glass Company in 1893 under the supervision of architect C.H. Townsend.
A Church Near You
British Listed Buildings
Nigel Coates at Wikimedia Commons
Pevsner, Nikolaus and David Neave. Buildings of England: Yorkshire: York and the East Riding. New Haven: Yale University Press, 1995. 580.