Im Looking for the Parents of Anderson Campbell 1756 1838 and Catherine Purney Abt 1765 Middlesex England

I know Anderson Campbell married Catherine Purney on 17 October 1777 in Surrey England
and they had the following children;

John Campbell 1786 - ?
Thomas Campbell 1788-1872
James Campbell 1790-1792
Elizabeth Campbell 1792-1864
Anderson Campbell 1795-1854
Samuel Campbell 1797-1878

Anderson Campbell Senior was buried on 11 June 1826 at Islington England

Any information on Anderson Campbell Senior and Catherine Purney would be appreciated
In particular I would love to find the parents of Anderson Campbell.

Thank you for your help