I have found 3 families surnamed Asals baptizing children in the first decade of the 1800s in two East London churches.
John and Mary Ann, address Roadside– daughter Mary Ann in Whitechapel St Mary, 1805.
James and Ann, address Roadside – Ann in 1798, Joseph in 1802 and William in 1806, all in Whitechapel St Mary.
James and Elizabeth, address sometimes Roadside, sometimes other streets: Elizabeth (1802), Mary (1803), Mary Ann (1806), James Henry (1807), Esther (1809), and Russ (1811). The first 3 were in Whitechapel St Mary and the last 3 in St George in the East. James’ occupation is sometimes given as carver or chair carver.
There is also Jas Asals, child of Jas and Eliz’th baptized in 1778 and John Asell son of James, cabinet maker, and Elizabeth baptized in 1780. This must be a different couple given the 33 year span of births. Perhaps Jas of 1778 is the father of the children baptized between 1802 and 1811.