Ref TNS: Harpenden : A family in Harpenden is seeking a nanny for one boy of 18 months. Days: Mon-Thur | Hours: 8.30am-5.30pm | Ages: B18m | Salary: £13-15ph- A family in Harpenden is seeking a nanny for one boy of 18 months- They need 4 days per week - ideal…