Dyson DCO1 Hepa Filter (Waterlooville PO7)

New Hepa filter for Dyson vacuum cleaner DCO1. In new condition and still boxed. I received this from a Freegle member but didn't realise until I got it home that it is not right for my DCO1. My vacuum cleaner is one of the very first Dyson DCO1 models and was not then built to take a Hepa Filter. The DCO1 models were redesigned later to be able to use a Hepa Filter.