Nancy, offer part-time childcare in South wootton

We are a family of three. My husband is a doctor currently working in Cambridge, and I am returning to work in London after my maternity leave. Our son is 12 months old and will be starting nursery in September, attending 4 days a week with 2 full days and 2 half days. I am looking for someone to pick him up from nursery at 6 PM on 3 days a week and stay with him until either my husband or I return from work, which will be no later than 9 PM.