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.
Berriedale
Berriedale is a small estate village on the north east coast of Caithness, Scotland, on the A9 roadway between Helmsdale and also Lybster, near the limit in between Caithness and Sutherland. It is protected from the North Sea. The village has a parish church in the Church of Scotland. Simply south of Berriedale, heading to the north, the A9 passes the Berriedale Braes, a high drop in the landscape (brae is a Scots word for hill, a loaning of the Scottish Gaelic bràighe). The road falls considerably (13% over 1,3 km) to bridge a river, before rising once more (13% over 1,3 kilometres), with a variety of sharp bends in the roadway-- although a few of the hairpin flexes and various other close-by slopes have actually been alleviated over the last few years. The impracticality (and price) of linking the Berriedale Braes protected against the building of the Inverness-Wick Far North Line along the eastern coastline of Caithness; rather the railway runs inland via the Flow Country. Berriedale lies at the end of the 8th stage of the seaside John o' Groats Path.