| 1 | Bank of England | Central banking | Monetary policy, financial stability, currency control | Governor Andrew Bailey, MPC members | High |
| 2 | Prime Minister/10 Downing Street | Executive leadership | Government leadership, policy direction, international relations | Keir Starmer, cabinet, senior advisors | High |
| 3 | City of London/Financial Services | Global finance | Investment banking, insurance, foreign exchange | Bank CEOs, Lord Mayor, financial executives | High |
| 4 | HM Treasury | Fiscal policy | Government spending, taxation, economic policy | Chancellor, permanent secretary, senior officials | High |
| 5 | The Crown/Monarchy | Constitutional head | State ceremonial, soft power, constitutional stability | King Charles III, royal household | High |
| 6 | Parliament (House of Commons) | Legislative authority | Law-making, government oversight, budget approval | Speaker, party leaders, select committee chairs | Moderate |
| 7 | Cabinet | Executive decision-making | Policy coordination, ministerial oversight | Cabinet ministers, deputy PM | High |
| 8 | House of Lords | Upper chamber | Legislative review, expertise, constitutional balance | Lord Speaker, crossbench peers, party leaders | High |
| 9 | GCHQ/Intelligence Services | Intelligence/security | National security, cyber warfare, foreign intelligence | Intelligence chiefs, security establishment | High |
| 10 | FTSE 100 Companies | Corporate power | Economic output, employment, international business | CEOs of Shell, BP, Vodafone, major corporations | High |
| 11 | Conservative Party | Political organization | Electoral politics, right-of-center policies | Party leader, 1922 Committee, major donors | High |
| 12 | Labour Party | Political organization | Electoral politics, center-left policies | Keir Starmer, NEC, trade union backers | Mixed |
| 13 | Supreme Court | Highest judicial authority | Constitutional interpretation, final legal appeals | President and justices of Supreme Court | Moderate |
| 14 | BBC | Public broadcasting | Media influence, public opinion, cultural power | Director-General, BBC executives, board | Moderate |
| 15 | Civil Service | Administrative apparatus | Policy implementation, institutional continuity | Cabinet Secretary, permanent secretaries | Moderate |
| 16 | Financial Conduct Authority | Financial regulation | Banking oversight, market regulation | Chief executive, senior regulators | High |
| 17 | Major Media Groups | Private media | News/information, public opinion, political influence | News UK, Daily Mail Group, Telegraph executives | High |
| 18 | Trade Union Congress | Labor representation | Worker rights, collective bargaining, political influence | TUC General Secretary, major union leaders | Low |
| 19 | Devolved Governments | Regional governance | Scotland, Wales, N. Ireland administration | First Ministers, devolved administrations | Mixed |
| 20 | Liberal Democrats | Third party | Political opposition, coalition potential | Party leader, parliamentary group | Mixed |