So in my opinion Witness 2 is located along Blackpool lane on the opposite side of the road to the entrance of Allotment Lane.
From street view it looks like a black dome camera is fixed to the underside sofit of the rendered house on the corner of Allotment Lane. The garden fence railings match the street view image.
Mark up created by myself. High quality link below
View attachment 400195
Images from Google Earth Pro and Street View
Image of woman with push chair from
here
High Quality version of attached
here