Where does discrimination come into it???
When someone in (my) work got a full disciplinary because they left � hour early one day.
The day before, 30 people left 2 hours early because a load of over-paid pansies happened to be kicking a football around, and absolutely nothing was said, nor was it officially authorised.
In Employment Law, discrimination does not necessarily mean "race, gender or sexual orientation", but victimisation can occur where one person is treated unfairly and unequally when compared with the traetment of their fellow workers.
So unless your work said officially that employees were entitled to time off to watch the football, and that it applied equally (or fairly) to all, rather than just " turning a blind eye " to absenteeism on match days, then, yes, I would agree that a company could face "unfair treatment" claims - unless they had agreed that those not watching the match / left behind / manning the fort etc.could have similar time off in-lieu.
So stick that in your rusty spoon.