Hi Deb
Keeping my fingers crossed and assuming his dad will be Edward - I found this marriage on the IGI at www.familysearch.org
EDWARD. DORRICOTT Spouse: ANN CROWTHER
Marriage: 18 JUL 1831 Saint Julian, Shrewsbury
Hi, have at last got the marriage cert for Thomas and Emma, and yep, you were right, His father is Edward

thank you all so much for your help, Thomas's age on the cert points to him being born in 1836, so the search is on !!