) You win a large contract from a local government department. To keep the relationship sweet and the official on-side you pay her £1,500 as a "thank-you".
B) A business partner demands a fee that was not previously agreed before he will agree to amend a contract. He wants that fee paid into his personal bank account and you make that payment.
C) You appoint an agent to tender for work. You conduct due diligence on the agent, pay them a market rate and include anti-bribery clauses in his contract. He then bribes without your knowledge or consent.