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.
Pwllheli
Pwllheli is a neighborhood and the main market community of the Llyn Peninsula (Welsh: Penrhyn Llyn) in Gwynedd, north-western Wales. It had a population of 4,076 in 2011 of whom a big percentage, 81%, are Welsh talking. Pwllheli is the area where Plaid Cymru was founded. It is the birthplace of the Welsh poet Sir Albert Evans-Jones (bardic name Cynan). Pwllheli has a series of stores and other solutions. As a local railhead with a market every Wednesday, the community is a gathering point for the population of the entire peninsula. For years a holiday camp run by Butlins ran a few miles from Pwllheli at Pen-y-chain. During the 2nd World War it came to be a marine camp, HMS Glendower, and it operated a hospital for damaged servicemen at Brynberyl on the Pwllheli to Caernarfon roadway two miles out of community. After the war, Butlins re-established the vacation camp. The camp, currently relabelled Hafan y Môr ("Haven of the Sea"), has actually been redeveloped and also is currently run by the Haven group.