to enquire with candidates we aren't offering the nanny job to, whether they would be interested babysitting time? I have met a couple I would like to stay in touch with on a more casual basis - we often have issues finding sitters - who just don't have quite enough experience to take on a 30 hour a week sole charge role. It's not that I feel they would be utterly incompetent it's just that they mostly haven't done whole days caring (more like school runs either side of the day) or have only ever really been supervised (mum around most of hte time) or are just a BIT too young. They would be fine for an evening or the odd weekend we needed some help for a few hours.
We've actually been surprisingly lucky this time and have had several candidates who live quite near us reply and also a much higher quality pool of applicant than last time.