Kilmorie Nursery is really good.

The difference between school nurseries and private nurseries is the hours. Every child aged 3 is entitled to 15 hours of nursery care. In school nurseries this usually happens 5 days a week for 3 hours a day.

Private nurseries have different hours e.g. full days, which are better for working parents. However you will have to pay for the extra hours. Also private nurseries may offer the option of giving them lunch.

It really depends on what fits in with you, but do ring and have a look round a few - as others have said it's best not to just turn up as you may not be able to see round.
There is also St Georges Pre-school Nursery on Elm Lane which is nice.