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.
Llangefni
Llangefni is the county town of Anglesey in Wales and also contains the principal workplaces of the Isle of Anglesey Area Council. United Kingdom Census 2011 recorded Llangefni's population as 5,116 individuals, making it the 2nd largest settlement on the island. The town is near the centre of Anglesey, and also is on the River Cefni, after which it is called. Its attractions consist of the Oriel Ynys Môn museum, which information the background of Anglesey as well as houses the tradition collection of Charles Tunnicliffe. In the west of the community is a huge secondary school, Ysgol Gyfun Llangefni (Llangefni Comprehensive School), as well as in the north a Victorian parish church, St Cyngar's, set in a woody waterfront area called the Dingle. The town was previously called Llangyngar, Welsh for "St Cyngar's church".