noble Around here you can get five mornings / afternoons (you get assigned one) in term time of nursery education at a local primary school. At ours, it's free flow with Reception, apart from 20 minutes when Reception children do phonics and Nursery children have story time. You apply in the same way as for Reception, but have a better chance of a place as there are twice as many (because of the morning / afternoon sessions). It's free, and (depending on when your child is born) it's between three and five terms before the Autumn they start school.
Unfortunately, it's utterly impossible to access unless you have a stay-at-home parent, a full-time nanny or (and these are like gold-dust) a childminder prepared to do the nursery lunchtime run as well as the school run.