Hi Dragongirl,
I don't think this is the same James Sansom, unfortunately. The one who is at Uplyme in 1841 Census is still working at William Davey's farm in the 1851 Census and gave his birthplace as Uplyme, not Honiton or Cullompton - both of which are more than 10 miles away.
I know there are several Sansom families with children detailed in the 1826 Uplyme 'census' by Rector Henry Tuck and I assume he belongs to one of those, so he ought to be in the Uplyme parish baptism register if it survives - but I don't have access!
Many thanks for your help.
mousequakes