Thankyou so much for the information.
Since my original post, I also found the marriage registered in Goole. The birth notices for the children were also registered through Goole District.
From Williams death cert,(b.1832) I have his parents as Thomas Hird(occupation unknown) and Mary Hird (formerly Hewitt). He lived in the colony (of Vic, Aust) for 49 years, so he arrived in Aust. about 1862. So far I have found one shipping record that looks promising - arrived Victoria Sept1862, William HIRD (age 36) on 'Elizabeth Ann Bright'.
His wife Ann's death cert shows her father as Jitian Cockin (weird Christian name, I know) and mother as Jane Cockin (nee Popplewell). I did find a death registered in Goole for a Jane Cockin b.approx 1798
d. Dec Q 1872 age 74
Vol 9C Page 388.
I am in the process of ordering a copy of the marriage certificate. I hope it will provide further leads.
I am relatively new to tracing my family tree, and have much to learn, so thankyou again for your help - I didn't know William was a butcher or where Willaim and Ann were born, so you have helped me immensely.