Ive worked at some strange firms with tea & lunch break restrictions
1) 1@10 mins AM 1@60mins Lunch
2) 1@15 mins AM 1@30 mins Lunch 1@15mins PM
3) 1x 10mins AM or 1X 10mins PM 1@ 20mins Lunch
4) 1@30 mins Lunch Tea breaks - as required
As you can see there's no pattern to what they can do
Although option 4 appears to be the norm for most office based roles, as your having to fit in round shift based activitys elsewhere
Mart