Hello Roy,
Looking at the Northamptonshire Burial Index, I found an entry for a George WARING, baker, on 8 Jul 1769 in Scaldwell. I suspected this could be Sarah's father, and had a look at the Baptism Index
I found a whole family of Warings: Elizabeth 1739, Sarah 1740, John 1742, Anne 1744, Mary 1748 and George 1749, all in Scaldwell, children of George and Elizabeth.
George and Elizabeth (Fox) were married in 1737 in Lamport