Hi Aussie Roy,
Not sure if this is any help but this looks like Thomas in 1841:
HO107/1319 5 27 8
Bentham, Yorkshire
Green Head
Gilbert Townson, 65, Cordwainer
Ann, 55, not born in county
Alice, 20
Thomas, 15, Cordwainer
Robert, 3 months
John Gudgeon, 15, Blacksmith
Maybe he was born to Ann before she married Gilbert?
Edit: Looking at the 1851 census, I wonder if it's the same Ann who is living next door to Thomas...