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.
Isle Of Coll
Coll is an island located west of the Isle of Mull in the Inner Hebrides of Scotland. Coll is understood for its sandy coastlines, which rise to develop big dune, for its corncrakes, and also for Breacachadh Castle. It is in the council location of Argyll and Bute. Coll has to do with 13 miles (20 kilometres) long by 3 miles (5 kilometres) wide and has a population of around 150. Coll's sandy beaches rise to create large sand dunes. The acme on Coll is Ben Hogh in the mid west of the island, a ridge with 2 tops running NW/SE, which increases initially to an elevation of 104 metres (341 feet) with a triangulation column, and also to 106 metres (348 ft) 450 metres (492 yd) to the southeast. In the 2011 census, the island's population was recorded as 195, representing a rise over the previous years of virtually 19%.