Professional Standards and Ethical Judgement
Policing in England and Wales rests on consent, and consent rests on ethical behaviour. The anchor documents are the Code of Ethics and the ten Standards of Professional Behaviour: honesty and integrity; authority, respect and courtesy; equality and diversity; use of force; orders and instructions; duties and responsibilities; confidentiality; fitness for duty; discreditable conduct; and challenging and reporting improper conduct. Learn the standards by name, because questions often turn on which one is engaged.
Core ideas
Ethical judgement means acting lawfully when nobody is watching, declaring conflicts of interest, being accurate in statements and notes, and using powers for their proper purpose. Challenging and reporting improper conduct is a positive obligation, not a matter of personal loyalty. Confidentiality is not a courtesy: police information is disclosed only for a policing purpose, on a need-to-know basis. Gifts and hospitality are declared, not quietly accepted.
Traps
Questions dangle a kind-looking shortcut: quietly warning a colleague who photographed a scene, checking a police system for a friend, accepting a small gift, or shading a statement to secure a conviction. Other traps are passivity ('not my job') or going straight to the media or an outside body before telling a supervisor. The best answer is usually transparent, recorded, and escalated through the proper line.
Worked example
You see a colleague pocket a seized phone instead of bagging it. Do not ignore it, and do not stage a public confrontation. Ask them privately to exhibit it correctly; if they refuse, report it to a supervisor. Rule of thumb: choose the option you would be content to justify in writing to a misconduct panel.