This will depend on the issue. However, many plumbers are also Gas Safe Registered, meaning they can undertake work on all aspects of boilers and central heating systems. It's best to look out for plumbers that display the badge of your boiler on their literature.
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., a number of whose books are embeded in Dunbeath as well as its Strath. Dunbeath has a very rich archaeological landscape, the site of numerous Iron Age brochs and also an early middle ages reclusive site (see Alex Morrison's archaeological study, "Dunbeath: A Cultural Landscape".) Of Dunbeath's landscape, Gunn wrote: "These small straths, like the Strath of Dunbeath, have this intimate elegance. In boyhood we are familiar with every square lawn of it. We include it physically and also our memories hold it. Birches, hazel trees for nutting, pools with trout and also a periodically visible salmon, river-flats with the wind on the bracken and also disappearing rabbit scuts, a wide range of wild blossom and little bird life, the skyrocketing hawk, the unexpected roe, the ancient graveyard, thoughts of the individual that when lived far inland in straths as well as hollows, the past and also today kept in a moment of day-dream." ('My Bit of Britain', 1941.). There is a community museum/landscape interpretation centre at the old town institution.