Change of use of agricultural building to residential use ancillary to the host dwelling (part-retrospective), internal and external alterations to create guest accommodation on the ground floor, internal and external alterations to create a study/home office on the first floor (retrospective)

External works and alterations (retrospective) including - the construction of a new entrance porch, new chimney, replacement cladding and external materials to the walls and roof and new windows and doors to allow the change of use of the building for uses incidental to the principal use of the dwelling known as Birchwood Farm as a home office, overnight guest accommodation, and the provision of new welfare facilities including toilet and shower in addition to agricultural use