There is a tree on Ancestry (not necessarily accurate) which has her baptism at St Mary, Whitechapel 29 March 1752 (parents William and Hannah LOVERIDGE of Church Lane).
I would be dubious about this, except that the baptism of Edward and Mary BANNISTER's daughter Rosamond on 17 Sept 1780 at Blisworth, Nothamptonshire says that the parents were 2 travellers.
Do you have any other information from the marriage - witnesses or abode?