We just went to visit a nursery today which we were very happy with but we found out that they charge for a full 10 hour day (8am-6pm), independent of when you drop your child off and pick them up. Probably naively, I was planning to use 30 hours free childcare for our son for 9am-3pm, 5 days a week. But it sounds like we'd be forced to pay for 5x10=50 hours per week and so only 3/5 of the week would be free (for 38 weeks of the year).
I'm just wondering if this is common in nurseries before we start looking into other options that might give us a better deal?