...but Bedfordshire Boy (David),
You seem to be the lucky one as I managed to extract a pile of BLANE/BLAYNE/BLAINE burials from the Bishop's Transcripts.
First of all, in Foxton for the period you wanted, a marriage:
26-04-1624: George FLACKE and Elizabeth BLANE.
Just a couple of burials here: 25-06-1622: Thomas BLANE son of Henrie and Margaret; and 01-01-1625: Margaret BLANE daughter of Henrie and Margaret.
So, yes, she was buried before 1630.
Now the Foxton burials, please excuse me for a moment while I reach for a beer in the fridge - still quite hot here in Cambridge for September!
Regards,
keith