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.
Invergarry
Invergarry (population 438) is a village in the Highlands of Scotland. It remains in the Great Glen, near where the River Garry moves right into Loch Oich. Near the centre of the town is the junction between the A82 road (from Inverness to Fort William) as well as the A87 road which branches off to the west towards Skye. The destroyed Invergarry Castle is located near the town on Creagan an Fhithich (the Raven's Rock), overlooking Loch Oich. Along with playing host to the neighborhood shinty club, Glengarry Shinty Club, it is the residence town of shinty legend, James Clark. It has a Primary School with a roll of 33.