Hi Neil,
I've got the following in Ilminster:
Marriage:
20 March 1834 Simon Harris Bachelor Ann Brown Dyke Spinster Henry Codrington curate, "w.c. of c"
Looks as if her surname was Dyke...
Couldn't find a record for Simon Harris' baptism (or for Ann Brown or Ann Brown Dyke)
PM me your e-mail address and I can send you copies of the relevant PR transcripts.
Regards,
Patricia