Advice on looking for a nanny

[Orangesquash]

Hi all,

I am a first time mum looking for someone to take care of my baby when I go back to work from mid July. I wondered if anyone had any advice on where to go to find (or how to safely go about finding) someone who is experienced, vetted etc. It feels a nerve wracking thing to find someone who you can trust so I would really appreciate any advice or leads. My ideal is a personal recommendation from a mum who has worked successfully with someone in the past - that would help put my mind at ease! I am hoping for someone who can do 3 to 4 full days per week.

Many thanks in advance of any help!