The definition of 'culture' in the context of PRINCE2 and project management is the set of shared attitudes, values, goals, and ways of working that characterize a group of people. Culture impacts how project teams operate and interact, influencing decision-making, teamwork, and the overall success of a project. References:
PRINCE2 training materials and project management culture insights.

Under the 'exception management technique' in PRINCE2, the roles most likely to identify issues that exceed stage tolerances are the Project Executive and the Project Manager. The Project Manager monitors the project's progress against its plans and will identify any deviations that might breach the set tolerances. The Project Executive, being accountable for the project's overall success, also plays a crucial role in overseeing tolerance thresholds and taking appropriate actions when these are exceeded.
(PRINCE2 7 Foundation Handbook, AXELOS)

A risk budget should be used to implement contingency plans (2) and actions to avoid a risk from occurring (3). This budget is set aside to fund specific actions that are part of the project's risk management strategy, enabling proactive and reactive responses to identified risks, ensuring the project remains on track despite uncertainties.References: = PRINCE2 7 Foundation handbook and online resources

Section: Volume B
Explanation/Reference: http://prince2.wiki/Organization#Three_Project_Interests