As a student of Royal Holloway, you have access to Senate House Library.
There is a Senate House returns drop-box on campus, which until recently has had limited opening hours. However, from now you can return your Senate House Library books whenever you wish. There is a security light to make it safe to deposit items when it’s dark.
A further improvement is that the box will now be emptied twice, rather than once, a day.
You can find the box at the University of London Despository – Building 39 on the campus plan.