The feasibility of this will depend on the roof’s strength, in particular its load bearing capabilities. This is simply because tiles are heavier than the metal sheeting. Normally a tiled roof will need to take a load capacity of 60kg per square metre. You will need a trusted roofing company to advise on this.
Dunbeath
Dunbeath is a village in south-east Caithness, Scotland on the A9 road. It was the birthplace of Neil M. Gunn (1891-1973), author of The Silver Darlings, Highland River etc., most of whose stories are set in Dunbeath as well as its Strath. Dunbeath has a really abundant archaeological landscape, the site of countless Iron Age brochs as well as an early middle ages monastic site (see Alex Morrison's historical survey, "Dunbeath: A Cultural Landscape".) Of Dunbeath's landscape, Gunn composed: "These small straths, like the Strath of Dunbeath, have this intimate elegance. In boyhood we get to know every square lawn of it. We incorporate it literally as well as our memories hold it. Birches, hazel trees for nutting, swimming pools with trout as well as a sometimes visible salmon, river-flats with the wind on the bracken and also disappearing bunny scuts, a riches of wild flower and also small bird life, the rising hawk, the unexpected roe, the ancient graveyard, thoughts of the people who as soon as lived much inland in straths and also hollows, the past and the here and now held in a moment of day-dream." ('My Little Britain', 1941.). There is a neighborhood museum/landscape interpretation centre at the old village institution.