It should include a market research that identifies your competitors, their share of the market and the range of the products they produce. By learning how they conduct their operations, you may learn tricks of the trade in the business you want to enter and you also get to have a basis on what you can do to excel.
A brief account of how the company began- You should mention in your business plan the history behind the formation of you company and the background of the founders and directors.
Non disclosure agreements (NDAs) with third parties, non-compete agreements, conflicts of interest, privacy concerns, and the protection of one's trade secrets may severely limit the audience to which one might show the business plan. Alternatively, they may require each party receiving the business plan to sign a contract accepting special clauses and conditions.
Executive summary- The executive summary is the backbone of the business plan and it should include a brief background of the business concept, company's objective's or your plan, ownership structure, management team, service offering, target market(s), competitive advantages, marketing strategy and high-level financial details like expected profit, required funding etc. It helps the bank or finance executives to get an idea of your business.