Am i allowed to use all my vouchers to cover whole days, or do i have to use them as 2 1/2 hours a day over the week. It would suit me better to use them all at the beginning of the week as i work three days and have no need for childcare the rest of the week.

You can use your vouchers however you like at my son's nursery. I think it is at the discretion of the nursery/pre-school,though. Speak to the manager of the nursery to find out their policy.