Having done a little more research I found that St Marys Manchester took over three properties in Prestbury during WWII: Collar House, Prestbury Hall, anf Adlington Hall.
On re-checking my birth certificate My place of birth is shown as St Marys Hospital [Village Branch] Prestbury R D [assume Rural District].
According to St Marys archivist this would have probably referred to Prestbury Hall, with Collar House being shown as Prestbury Main Branch, and Adlington Hall was reserved for wives of serviceman -my father was in a reserved occupation so that is ruled out.
I was under the impression I was born at Collar House by another Mancunian who was born there. Now I know different, and Prestbury Hall is presently up for sale but as I am not a footballer I can't afford it!