Thomas Bignold

Samuel Bignold's father was Thomas Bignold, also of Norwich, and founder of the Norwich Building Society.

Norwich Union was founded in 1797 in Norwich, when 36-year-old merchant and banker Thomas Bignold formed the "Norwich Union Society for the Insurance of Houses, Stock and Merchandise from Fire", a mutual society owned by the policyholders who received a share of the profits. This in turn became known as the Norwich Union Fire Insurance Office.

Samuel Bignold 1791-1895

Part of portrait (1874), of Sir Samuel Bignold (1791–1895), 

by Frederick Sandys (1829–1904) from Wikipedia

Edward Henry Bickersteth's father-in-law was Samuel Bignold - later Sir. Samuel had been Mayor of Norwich and later MP.