Subregions of Upper Sundon
Following direct parts of Upper Sundon have been played so far:
Neither Ruled nor Mapped Subregions so far: Sundon.
 Sibling Regions of Upper Sundon
Played regions on same layer like Upper Sundon until now:
Neither Ruled nor Mapped Sibling Regions until now: Aspley Guise, 
Biggleswade, 
Caddington, 
Everton, 
Fancott, 
Hulcote and Salford, 
Langford, 
Marston Moretaine, 
Ridgmont, 
Sandy, 
Slip End, 
Tempsford, 
Toddington.