Does anyone have access to the parish records of St Peter's Church, Dunstable?

I am interested in the Dickens/Dickins family who were connected to St Peters until the older members of the family died and the younger ones relocated to Sandridge, Hertfordshire.

I would like to find the marriage of Thomas Dickens/Dickins & Mary (possibly Day) around 1765 and to know if there were any other children in the marriage before Mary's death in 1777

Thanks in advance!