I seem to recall that both of the individuals I've encountered were eventually dismissed as Tree Sparrow / House Sparrow hybrids: were either DNA tested? Online I've seen it suggested that the Italian Sparrow is a 'stable hybrid' between Spanish Sparrow and House Sparrow: perhaps there's a 'stable hybrid' colony of Tree / House Sparrows in South Devon!
The photos of the Devon birds below are by R.Harris and Steve Hopper (hope they don't mind!) The Norfolk pictures are mine.
|South Brent, 2020|
|East Budleigh, 2017|