What does 'two years to one' or 'two years to two' mean in UK university evaluation for a Master's/Postgraduate?

In the UK university grading system, "2:1" (two-one) and "2:2" (two-two) are classifications for undergraduate honours degrees:

- 2:1 (Upper Second-Class Honours): Awarded for an overall mark between 60% and 69%. This is the most common requirement for competitive jobs and master's programs.
- 2:2 (Lower Second-Class Honours): Given for marks between 50% and 59%. This is a solid result but may not meet entry criteria for some postgraduate courses or top employers.

These classifications are important for academic progression and job applications in the UK.