I'm still hunting.....
SEAX has the Little Hallingbury PRs from about 1711 for births and baptisms and 1690 for burials. Does anyone know where the earlier registers are and if they're accessible? They are to be commended for the job that they're doing with these. It's just a pity that brute force searches are required. However these searches do often turn up little gems....
According to a note in the available PRs, the early registers are on parchment, while the registers after 1711 were on paper. The congregation approved replacement of the paper with parchment and for the transcribing of the PRs to that parchment.
Also, under Hertfordshire in FindMyPast, for a lot of Essex registers there are transcriptions for the years of 1629 and 1630. I found them by accident, so I haven't the foggiest idea how to get them back and which parish they're under.
Kind regards, Keith