Update Leicester Christmas visit slots
Update Leicester Christmas visit slots

Unbookable
- Christmas Day
- Boxing Day
- New Year's Day

Slot anomalies:
- Christmas Eve 0900-1100 and 1415-1615
- New Year's Eve 0900-1100 and 1415-1615
ministryofjustice/prison-visits,ministryofjustice/prison-visits,ministryofjustice/prison-visits