There is this 1841 census William and George are there with the parents the rest of the children seem to get baptised in Brockley instead of Gazeley. What else sticks out is that this is also the same place you're Hannah is living
The Green, Brockley, Thingoe, Suffolk, England
William Bishop Male 45 1796 Suffolk,
Elizabeth Bishop Female 45 1796
William Bishop Male 20 1821
George Bishop Male 20 1821
Alfreed Bishop Male 15 1826
Thomas Bishop Male 12 1829
Samuel Bishop Male 10 1831
Mary Ann Bishop Female 16 1825
Sarah Bishop Female 8 1833
Elizabeth Bishop Female 3 1838