There is an old photo of Westhorpe House on this page: https://www.nugentsofantigua.net/?page_id=1958
I find the case made out for this being the 'Hidden House' quite persuasive.
On the subject of identifying places, why is Larry & Daisy's house placed in New Road rather than Highfield Road? I realise that when they see the fire (at the beginning of Burnt Cottage) it could be assumed that they are looking out of a back bedroom, but wondered if there was anything more concrete. It is just that the house identified for them in New Road seems too small.