Complex sentence: Banham Group (formerly known as Banham Patent Locks) is a family owned company in the security industry established in 1926, and now the largest supplier of burglary and fire prevention systems in London.
Split into simpler sentences: Banham Group (formerly known as Banham Patent Locks) is a family owned security company. Established in 1926, Banham Group are now the largest supplier of burglary and fire prevention systems in London.