It’s probably an illusion that Hornchurch was named after these horns, but it seems there was a bull’s head and horns on an earlier church.

But the Resurrection Window appears to be post-medieval:

Note computer, Spitfire and car:

Details of how to ring and ringers’ jugs at The Bells of Hornchurch.

I was impressed that they were ringing this lunchtime, but was told that it is all about Waterloo, and too jingoistic for my informant.