Hi Paul
I'm afraid what I was able to find probably isn't going to be terribly helpful to you.
I looked back to 1780ish and found.
Dec 13 1778, bap. Charles, son of Charles & Elizabeth Fowler
Oct 15 1780, bap. Anne, dtr of John & Elizabeth Fowler
Jan(?) 6 1782, bap. Thomas, son of Charles & Isabella Fowler
Aug 7 1785, bap. John, son of Charles & Isabella Fowler
There was nothing any later in this particular film.
Sorry I couldn't be more help on that. I have renewed the film and will have it for a while longer now if you have anything else.
Looking through the other parishes on the film (to make sure that none of my lot were hiding out anywhere!) I did come across quite a few Fowlers in Langham, Rut., also one each in Glaston & Hambledon, just let me know if you want them as I jotted them all down.
Good luck with your search,
Louise