If you are one of the settings listed below you can purchase a defibrillator via the government scheme

maintained schools • academies • independent schools • sixth-form and further education colleges • maintained and independent nursery schools • pre-school establishments • private, voluntary and independent nurseries • playgroups • holiday and out-of-school providers

The scheme is not widely publicised.  Take advantage of this great offer. Defibrillators are around £606 inc VAT.

You can read the guidance here.