^^^ There were other English gold medal winners in 150cl bottles though, Gumboot.
Full list here:
Gusbourne 2014 Brut Reserve, Kent
Nyetimber 2014 Blanc de Blancs Magnum, West Sussex & Hampshire
Squerryes 2016 Squerryes Brut, Kent
Sugrue 2014 The Trouble With Dreams, South Downs
Source:
https://www.champagnesparklingwwc.co.uk/results/results-2021/
Storrington has a priory, with a church that was opened in 1904:
https://taking-stock.org.uk/building/storrington-our-lady-of-england-priory/
[NB: I've not gone any further with my research. So, for all I know, I might be offering you a red herring here but I reckon that Sussex might be worth considering as it has both a priory/church and a wine that seem to fit].