A possible for Elizabeth going by a burial for Elizabeth Ansell in Babraham gave a birthyear of 1769
In Sawston ( 5 miles from Babraham)
Elizabeth baptised 16 April 1770 Sawston daughter of John & Elizabeth Lofts.
Claire
I don''t want to spoil the fun of researching, David, so you might want to check FreeReg where you will find a marriage for John and Elizabeth in 1769 in Sawston.
No LOFTS (including spelling variants) baptisms in Babraham, so Sawston looks a good bet.
Philip