The actual image of the baptism I referred to can actually be viewed on Familysearch.
To locate it use the catalogue - enter Brighton in the search box and select Brighton, Sussex, England and from its list of records select church records, scroll down until you come to the entry for Bishop's Transcripts, click on that and then find a symbol showing a camera. (I had to sign in to view the images but it is free!). The image is number 350 and states June 22nd (1817) Elizabeth, base born daughter of Hannah Grinyer, Abode King Street.
Its a bit fiddly but it works!
William