In addition to above I would go off your gut feeling, they can get the best Osfted report in the world but it's how you feel that matters above all else. We saw one when looking around who had outstanding Ofsted report but when we went to see her she promised to have our son walking by 1 yr old, hosted a playgroup once a week (whereupon it was unclear who would be looking after our son), didn't work summer hols at all (leaving 6 wk gap in childcare for us to sort), had a lounge the size of a bathroom, and a dog who she said was friendly who growled at my husband when let out of the kitchen!! We found the best childminders in the world by complete chance - Sylvia and Inay Rodriques on Muschamp Road. Close to ED station, like stepping into a Blue Peter set each day and the best possible childcare you could get second to you looking after your child yourself. Cannot recommend them more highly :)