As two graduates of Leeds University, we thought that the University needed a few more caches, as there are lots of potential hiding spots. The current Union building was built in 1939.
The cache is a magnetic nano and it is hidden outside the Union is an area fully accessible to the public. You do not need to enter the building to find the cache.
The area has a high muggle footfall, so please try to be subtle. The area is busy especially during term time, and this is increased during big events like Freshers Week. Weekday afternoons are busy, but mornings, evenings and weekends are a lot quieter.