Hi Stuart
I am working on the Wright family at present and having the same problems as you. Elizabeth Wright was my 2xggrandmother and have only just discovered that her father was Thomas WRIGHT, a boatman. I have her marriage certificate to Thomas BATE, also a boatman. I found that Elizabeth was ch on 21 Mar 1829 Lower Mitton, Worcester, and her sister Sarah was ch on 7 Jun 1827 also the same place. Parents were Thomas Wright and Sarah. Like you, I couldn't go any further, unable to find them on any Census until 1871 (where I found Elizabeth). I found this family on another site:
Thomas Wright b 1800 Nottinghamshire and also Birmingham
Sarah DEELEY born 1800 Birmingham
Siblings:
John b.21 Jun 1821 ch 28 Sep 1821 Birmingham (I found this source)
Benjamin b1825 Stourport (unable to find)
William b1825 Stourport (unable to find)
Sarah ch 7 Jun 1827 Stourport (found this)
Elizabeth ch21 Mar 1829 Stourport (found this)
Samuel b1834 Stourport (unable to find)
I noted someone else querying the Tonks family - Thomas Bate's daughter, Sarah Ann, married John Tunks, also a boatman (my ggrandparents).
Laurette