Hello
Freereg has a few baptisms for a Thomas Bullen in Norfolk around 1802.
One in Kings Lynn, 8/2/1801, parents Francis and Bulah
One in Redenhall, 17/1/1802 (born November 1801), parents James and Mary (Downing)
One in Great Bircham, 19/2/1804, parents William and Temperance.
I'm afraid that my knowledge of the geography of Norfolk is non-existent, and I don't know if any of these places are near Wortwell. Perhaps the names of Thomas and Phoebe's children give a clue.
Freereg has Thomas's name as Ballen on the marriage record. One of the witnesses is Mary Ballen, obviously a relative.
Bev