For situational anxiety I would have thought that standard 40mg tablets would do the trick.

The leaflet that comes with the 40mg drug states:
"Anxiety - 40mg before anxious situations. For long-term anxiety 40mg two or three times a day, treatment is reviewed after 6-12 months."

I'm taking them before stressful situations. Can't really comment on their effect as yet, but when I was on them 20 years ago they did help calm me.