Hi everyone, thank you all for your interest, Thomas Constant is a puzzle indeed.
I wonder if one of you could check the 1841/51 censuses again to make sure that I am researching the correct Thomas.
in those censuses he should have parents Samuel and Mary Ann, as well as siblings Robert, John, Samuel, Betsey Tunn, Hannah and others.
I had all the births of the IGI, and it appears Samuel +Mary Ann were the parents of 2 Thomas's as well as 2 Samuel's and 2 Mary's, and we all know how unreliable the IGI is.
Thank you all again for your interest and help.
Best Wishes Bethan