All professional nannies should hold an enhanced DBS (disclosure and barring service) certificate which is a criminal record check. This should also be registered with the DBS update service, an online system that keeps that certificate valid as an agent such as myself can check the DBS at any time to confirm that there have been no changes to that nanny’s criminal history. 
Caring for a newborn baby, be it your first or fifth, can be a very daunting experience! Even if you’ve done baby classes, the actual experience of bringing this tiny human home and being expected to know exactly what to do is terrifying. (I remember feeling that way even with a level 3 childcare qualification and over a decade of experience with other peoples children – I couldn’t believe they’d let me take this 12 hour old tiny thing home and expected me to just get on with it!) 
Some parents are lucky enough to have family members or friends to step in and help. But for those that don’t, or who want a professional to guide them, help is possible!