Not sure if you can get it at the sweet counters at mine. You in fact have to go up three escalators to get to a sweet counter. As the entire ground floor is just tills and the ATMs. This is the Cineworld in Glasgow.
Ah, right. Tallest cinema in the country, I believe! At mine you can get tickets at any counter, despite there being a separate box office. Maybe try it and see if it works!