I think that's right, you are entitled to unpaid time off for emergencies such as childcare etc.
"In addition, almost all employees have a right to take time off work, although not necessarily with pay, for the following:-
to participate in trade union activities
to perform ‘public duties’, for example, being a JP, local authority councillor or school governor
to care for their children. People who have worked for their employer for one year have the right to unpaid parental leave. You are entitled to 13 week's unpaid leave before your child is five. However, if your child is disabled, you get 18 week's leave which must be taken before the child is 18
to attend to unexpected problems with dependants, for example, where child minding arrangements break down. A dependant includes anyone who reasonably relies on the employee"