Amended scheme for the Change of Use of two barns to a dwelling

On one of my regular cycling routes through Trevivian I spotted this notice:

which mentions that:

The development, in the opinion of the Local Planning Authority, is likely to affect the setting, character or appearance of a Listed Building.

The associated planning application refers to an:

Amended scheme to that approved under PA12/00921 for the Change of Use of two barns to a dwelling, following demolition of existing agricultural buildings, together with the creation of an access at Middle Trevivian, St Clether, Launceston, Cornwall PL15 8PS.

Cornwall Council planning department would seem to be concerned about the proposal adversely affecting the setting of Trevivian Farmhouse, listed in Historic England as follows:

Farmhouse. Circa early C19. Stone rubble, slate hung on front elevation. Slate roof with gable ends, range on left reslated in circa 1980s and lower range on right with rag slate roof. Brick end stacks.