My great grandfather also came to Canada from Blagdon, England with his brother.My great gradfather was James Winstone, his younger brother was Charles Winstone.James was born about 1864/65, while Charles is born about 1868.
Both James and Charles settled at Strathclair Manitoba.James is my great grandfather, I believe that Charles is heads your branch of the tree.
As I understand it their father was William Winstone b ~1824 m Charlotte Hitchman b 1825 (William's first cousin).They also had 2 daughters who died as infants.
William's parents were apparently James Winstone b 1801 and Elizabeth Vowels b 1799 m February 23, 1824.
Charlotte's parents were William and Harriet - I have no other information on them.
Elizabeth Vowels parents were John (b 1773) and Elizabeth (b 1774) Vowels.
I access to information on James and Charles Winstone once they came to Canada, but little beyond what I have stated here for relationships in England.